Musnad Ahmad 1018:93

'Abd al-Rahman ibn Mahdi narrated to us, Isra'il narrated to us, from 'Uthman ibn al-Mughirah, from Salim ibn Abi al-Ja'd, from 'Abd Allah ibn Muhammad ibn al-Hanafiyyah, who said: I entered with my father upon a brother-in-law of ours from the Ansar, and the time for prayer arrived. He said: "O slave girl, bring me water for ablution so that I may pray and find rest." We saw him and disapproved of that from him. He said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'Stand, O Bilal, and give us rest through the prayer.'"