Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Khaythamah that he says Hazrat Abu Darda (may Allah be pleased with him) said: Before the Prophet Muhammad (peace and blessings be upon him) was sent, I used to trade. When he was sent, I continuously tried to combine worship and trade, but the two did not come together. So I chose worship and left trade.