Musannaf Ibn Abi Shayba 33:1013

Qabisa narrated to us, he said: Sufyan informed us, from Abu Hayyan, from his father, from a sheikh of theirs, that he used to, when he heard the beggar saying: "Who is it that would loan Allah a goodly loan?" he would say: "Glory be to Allah, and praise be to Allah, and there is no god but Allah, and Allah is the Greatest; this is the goodly loan."