And remember your Lord when you forget [it]
Do not say that I am doing this tomorrow, unless you make it contingent on the will of Allah, and say: God willing. And remember your Lord when forgetting by saying: God willing, and whenever you forget, remember Allah, for the remembrance of Allah removes the forgetfulness .
Allah said ( interpretation of the meaning ) : { And never say of anything, "Indeed, I will do that tomorrow," Except [when adding], "If Allah wills." And remember your Lord when you forget [it] and say, "Perhaps my Lord will guide me to what is nearer than this to right conduct." } Quran ( 18 : 23 – 24 )