From Sahih Muslim (Hadith 6507):
Yazid b. Abu Habib reported that Na'im, the freed slave of Umm Salama, reported to him that 'Abdullah b. 'Amr b. 'As said:There came to Allah's Apostle (ﷺ) a person and said: I owe allegiance to you for migration and Jihad seeking reward only from Allah. He (the Holy Prophet) said: Is one from amongst your parents living? He said: Yes, of course, both are living. He further asked: Do you want to seek reward from Allah? He said: Yes. Thereupon Allah's Messenger (ﷺ) said: Go back to your parents and accord them benevolent treatment
Reference: Muslim 6507