Musannaf Ibn Abi Shayba 33:1333

Sa'id ibn 'Abd Allah narrated to us, from Nusayr, from Bakr, who said: Al-Rabi' used to say: When morning comes, do good and speak good, and persist in righteousness. If you do evil, then repent; and if you do good, then increase. What you know, establish it; and what you are in doubt about, entrust it to Allah. The believer, do not harm him; and the ignorant, do not be ignorant toward him. Do not let time grow long upon you, lest your hearts harden. And do not be like those who said, "We hear," while they do not hear.