It is narrated from Abdullah bin Busr (may Allah be pleased with him) that a man said: O Messenger of Allah! The commands of Islam have become too many for me, so tell me about an act which I can hold firmly (and practice consistently). The Prophet (peace and blessings be upon him) said: “Let your tongue always remain moist with the remembrance of Allah.” [اسناده حسن، سنن ترمذي:3375، ابن ماجه:3793]