Sayyiduna Mu'awiyah bin Haydah (may Allah be pleased with him) said: I said: "O Messenger of Allah, to whom should I show the most kindness?" He (peace and blessings be upon him) said: "Your mother, then your mother, then your mother, then your father, then the nearest relative, and then the next nearest."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17008