Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) was asked: Which deed is the most excellent? He said: "Performing the prayer at its time." It was said: Then which? He said: "Kindness to parents." It was said: Then which? He said: "Jihad in the path of Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9773