Narrated Abdullah ibn Amribn al-’As: A man came to the Apostle of Allah (peace be upon him) and said: I came to you to take the oath of allegiance to you on emigration, and I left my parents weeping. He (the Prophet) said: Return to them and make them laugh as you made them weep.

Sunan of Abu-Dawood – Book 14 Hadith 2522