Musnad Ahmad 1018:127

Hajjaj narrated to us, Shu'bah narrated to us, from Sa'id al-Jurayri, who said: I heard 'Ubayd ibn al-Qa'qa' narrating to a man from Banu Hanzalah, who said: A man observed the Messenger of Allah, may Allah bless him and grant him peace, while he was praying, and he began to say in his prayer: "O Allah, forgive my sin, expand for me in my dwelling, and bless me in what You have provided for me."