It is narrated from a Companion (may Allah be pleased with him) that a person asked the Noble Prophet (peace and blessings be upon him), "Which deed is the best?" The Noble Prophet (peace and blessings be upon him) replied, "The best deed is to perform prayer at its appointed time, to treat parents with kindness, and to strive in the way of Allah (jihad)."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23120