Musnad Ahmad 788:160

Muhammad ibn Ja‘far narrated to us, ‘Uthman—meaning Ibn Ghiyath—narrated to us, from Abu ‘Uthman, from Abu Musa al-Ash‘ari, who said: I was with the Messenger of Allah, may Allah bless him and grant him peace, in one of the gardens of Medina. He mentioned the meaning of the hadith of Yahya, except that he said regarding the statement of ‘Uthman, may Allah be pleased with him: "Allah is the One whose help is sought. O Allah, grant patience, and upon Allah is the reliance."