Musnad Abu Ya'la al-Mawsili 148:20

Ali ibn al-Husayn al-Khawwas narrated to us, Baqiyyah narrated to us, from Uthman ibn Zafar, from Abd al-Malik ibn Abd al-Aziz, who heard Anas ibn Malik say: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When one of you comes to his wife, let him be truthful with her. If he precedes her [in climax], let him not hasten her."