It is narrated from Ikrimah (may Allah have mercy on him) that Sayyiduna Ibn Abbas (may Allah be pleased with them both) states: Do not buy and sell on credit until the salary (i.e., wages) is received, until the crop has been harvested, and until the grain has been sold.
Hadith Referenceمسند الإمام الشافعي / كتاب البيوع / 1435
Hadith Takhrijاسناده صحیح اخرجه البيهقي : 25/6 - وفى المعرفة السنن والآثار له (3585) - وعبدالرزاق، رقم: (14066) - وابن ابي شيبة (20242 ، 20243)۔