Musannaf Ibn Abi Shayba 13:2885

Abu Bakr narrated to us, he said: Isma'il ibn 'Ulayyah narrated to us, from Ibn Abi Najih, from Mujahid and Tawus, regarding the saying of the Exalted: "Then make a contract with them if you know there is good in them," they both said: Wealth and trustworthiness.