Musnad Abu Ya'la al-Mawsili 147:19

Al-Walid ibn Shuja' Abu Hammam narrated to us, Baqiyyah narrated to us, 'Uthman ibn Zufar narrated to me, from Ibn Jurayj, from the one who heard Anas ibn Malik saying: The Messenger of Allah (may Allah bless him and grant him peace) said: "When one of you has intercourse with his wife, let him be truthful with her. If he reaches climax before her, let him not hasten her."