Musnad Abu Ya'la al-Mawsili 155:358

Muhammad ibn 'Abbad narrated to us, Sufyan narrated to us, from Mansur, from Abu Hazim, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever performs Hajj to the House, and does not commit sexual obscenity (rafath) and does not commit wickedness (fisq), returns as the day his mother gave birth to him."