What is the best Remembrance?

Jabir ibne-‘Abdullah Radiyallahu ‘anhu narrates: I heard Rasulullah Sallallahu ‘alaihi wasallam saying: “The best Dhikr (remembrance of Allah) is La ilaha illallah, and the best Du’a (supplication) is Alhamdulillah (Praise be to Allah).” (Tirmidhi)

Note: This Kalimah is the basis of the entire Deen. Without the belief in Kalimah, neither Iman (faith) nor Aa’mal (deeds) are acceptable. Alhamdulillah (Praise be to Allah) is said to be the best Du’a because praising Allah, Who is the most Generous, amounts to asking Him for His help or favour. (Mazahir Haque)