Musnad Ahmad 524:5

'Abd al-Wahhab ibn Hammam, the brother of 'Abd al-Razzaq, narrated to us, saying: I heard Muhammad ibn Abi Humayd al-Madani, who said: 'Abd Allah ibn 'Amr ibn Umayyah narrated to us, from his father, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Whatever a man gives to his wife, it is a charity." Abu 'Abd al-Rahman said: "'Abd al-Wahhab ibn Hammam is the brother of 'Abd al-Razzaq."