The virtue and weight of لا إلاه إلا الله is due to the fact that it is the very basis of the entire structure of Islam. It contains the oneness of Allah Ta‘ala and the declaration of the servant that he will worship and obey none other than Allah Ta‘ala.

It is for this very reason that Rasulullah (sallallahu ‘alaihi wasallam) advised the Sahaabah (radhiyallahu ‘anhum) to renew and strengthen their Imaan by reciting the kalimah لا إلاه إلا الله in abundance.