The researcher conducted this research with the intention of explaining the prohibition of selling/buying on people who are in the process of bidding on goods, both in terms of fraternity and the negative impact  (consequences) that arise when bidding occurs while other people are still khiyar. This research was conducted by means of a literature review (Library Research) which uses data collection techniques in the form of documentation. For data analysis, namely literature analysis. The results show that Islam recommends maintaining brotherhood, especially in bargaining for goods when buying and selling so as not to result in market distortion, loss of willingness, violating the value of tolerance, unfair competition, the emergence of hatred, conflict of needs, and a weak level of prudence.

This study aims to reveal the legal verses in the Koran, especially the legal verses about human relationships (habluminannas) that have been written in the Koran, as a guide or reference for Muslims. Especially in the case, the number of verses regarding muamalah law is relatively small, especially when compared to the law verses on worship. While the development of life seems to continue to change. while the verse has no changes and additions. This research was conducted with literature study, data collection techniques using documentation techniques with data analysis, namely content analysis. The results show that the verses of muamalah law are classified into 7 (seven) sections, including those related to family law, civil law, criminal law, procedural law, administrative law, economic law, and finance. The verse of law regulates fellow human beings or muamalahs which provide little opportunity for Muslims to implement muamalah activities in accordance with the guidelines contained in the Koran and Hadith, if not explicitly explained it is supported by other legal products such as ushul fiqh and kaedah- fiqh principles.

Pakan merupakan komponen terbesar dalam kegiatan budidaya perikanan yang harganya kian meningkat. Manajemen pemberian pakan tanpa menggunakan bahan tambahan/suplemen adalah salah satu upaya efisiensi penggunaan pakan. Diantara inovasi teknologi budidaya yang aplikatif adalah dengan pemuasaan secara periodik. Penelitian mengenai pemuasaan banyak dilakukan tetapi penerapannya dalam skala massal belum banyak dilakukan, khususnya pada kegiatan marikultur. Tujuan kegiatan ini adalah untuk mengetahui dampak pemuasaan secara periodik pada pemeliharaan ikan kakap putih skala produksi di Keramba Jaring Apung (KJA). Parameter pengamatan yakni pertumbuhan, sintasan, rasio konversi pakan, dan efisiensi pakan.  Kegiatan kerekayasaan ini dilakukan pada bulan Februari - Agustus 2017 di Balai Perikanan Budidaya Laut Batam Provinsi Kepulauan Riau. Ikan kakap putih berukuran tebar awal 15 – 16 cm (48,50 – 67,15  gram) sebanyak 1.800  ekor dipelihara di dua jaring dengan kepadatan masing-masing 900 ekor dan perlakuan berbeda.  Perlakuan A, ikan uji dengan pemuasaan, lima hari diberi pakan lalu satu hari dipuasakan (5-1), secara periodik berulang hingga akhir pengujian. Perlakuan B, ikan uji diberi pakan setiap hari.  Pakan yang diberikan adalah pelet dengan kandungan protein 42% dengan dosis harian mulai 4% hingga 2% sampai akhir pengujian. Hasil pengujian menunjukkan berturut-turut perlakuan A : perlakuan B dari parameter sintasan 91,22% : 96,11%; pertumbuhan rerata harian 2,63 : 2,68; rasio konversi pakan 2,29 : 2,52; dan efisiensi pakan 0,44 : 0,40. Dari hitungan produksi, ikan yang dipuasakan dapat menghemat pakan sebesar 15,99%.  Ikan kakap putih dengan pemuasaan menunjukkan adanya pertumbuhan kompensatori dimana dapat memacu pertumbuhannya hingga menyamai bahkan melebihi ikan kontrol. Manajemen pakan melalui pemuasaan secara periodik 5-1 dapat menjadi salah satu solusi untuk efisiensi kegiatan budidaya kakap putih di KJA.

Purpose: This research aims to provide knowledge about qawa'id al-fiqhiyyah Hambali sect thought and its application in sharia economic law seen of the four popular rules of jurisprudenceDesign/Method/Approach: This research is library research, using documentation data collection techniques, and data analysis using content analysisFindings: Results showed that qawaid fiqiyyah dissect Hambali's for bidden right speed before the time, over the main push of the lift, badal (substitute) is positioned mubdal (replaced), and the latter considered common practice, while rare, and there is no law to him. The fourth method is able to address the problem Kulli (general), and in particular the problems of legal jurisprudence of Islam among the modern economy, which in this case study can not be separated from AL Quran and Hadits.Originality/Values: The main contribution of this research is to fill the gap in how the implementation of qawa'id al-fiqhiyyah mazhab hambali in Islamic economic law.

This study aims to explore more deeply the strategies for obtaining raw materials, diversification, and marketing of local food products of Rejang Lebong and the ethics according to Islamic economics. This qualitative descriptive study used data collection techniques in the form of observation, interviews, and documentation. Meanwhile, the data processing and analysis techniques used were descriptive and analytic. The results showed that the strategy for obtaining raw materials for local food production was by selecting quality raw materials. Diversification of local food products of several forms, namely Jantan Cookies, Vegetable Chips, and Krispi Petai. Marketing of local food products of Rejang Lebong is carried out by consignment, Direct Selling, Open Reseller, Online Shopping Applications such as Blanja.com, Shopee, Bukalapak, Tokopedia, social media such as Facebook, Instagram, Twitter, Youtube, Website, Whatsapp, and Television. Meanwhile, ethics in the development of local food products of Rejang Lebong according to the Islamic economic perspective, namely being honest, accepting criticism and suggestions from consumers, beneficial for others, affordable prices, not vilifying other people's businesses, not hoarding goods, not monopolizing, not selling haram goods, free from the element of Riba, and without coercion.