Hisham bin 'Ammar bin Nasayr هشام بن عمار بن نصير · The Book of Financial Transactions

"The Messenger of Allah forbade Gharar transaction and Hasah transactions."

"The Messenger of Allah was asked about (buying) said; 'Will fresh dates decrees (in weight or volume) when they dry out? 'They said 'yes so he forbade that"

"The Messenger of Allah forbade selling a heap of dried dates whose volume is unknown for known volume of dried dates,"

"We were with the Prophet at a funeral, and he said: 'I there anyone from banu so and so here? He said this three times. Then a man stood up, and he said to him: 'What kept you form answering the first two times? I am not going to say anything but good to you, so and so (mentioning the name of a man from among them) has died and he is being detained (from entering Paradise) because of his…