(11) باب ثَوَابِ الْعَبْدِ وَأَجْرِهِ إِذَا نَصَحَ لِسَيِّدِهِ وَأَحْسَنَ عِبَادَةَ اللَّهِ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
For a faithful slave there are two rewards. By him in Whose hand is the life of Abu Huraira, but for Jihad in the cause of Allah, and Pilgrimage and kindness to my mother, I would have preferred to die as a slave. He (one of the narrators in the chain of transmitters) said: This news reached us that Abu Huraira did not perform Pilgrimage until his mother died for (keeping himself constantly) in her service.
Reference: Sahih Muslim 1665 a
In-book reference: Book 27, Hadith 68
USC-MSA web (English) reference(deprecated numbering scheme): Book 15, Hadith 4099