The word(s) "strongest" appears 4 time(s) in 3 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) Fight then in Allah's way; this is not imposed on you except In relation to yourself, and rouse the believers to ardor maybe Allah will restrain the fighting of those who disbelieve and Allah is strongest in prowess and strongest to give an exemplary punishment.

(2) And they swear by Allah with the strongest of their oaths, that if a sign came to them they would most certainly believe in it. Say: Signs are only with Allah; and what should make you know that when it comes they will not believe?

(3) And they swore by Allah with the strongest of their oaths that if there came to them a warner they would be better guided than any of the nations; but when there came to them a warner it increased them in naught but aversion.