The word(s) "happy" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) Say (O Muhammad صلى الله عليه وسلم): "O my people! Work according to your way, surely, I too am working (in my way), and you will come to know for which of us will be the (happy) end in the Hereafter. Certainly the Zalimun (polytheists and wrong-doers) will not be successful."

(2) And those who break the Covenant of Allah, after its ratification, and sever that which Allah has commanded to be joined (i.e. they sever the bond of kinship and are not good to their relatives), and work mischief in the land, on them is the curse (i.e. they will be far away from Allah's Mercy), and for them is the unhappy (evil) home (i.e. Hell) .

(3) Musa (Moses) said: "My Lord knows best him who came with guidance from Him, and whose will be the happy end in the Hereafter. Verily, the Zalimun (wrong-doers, polytheists and disbelievers in the Oneness of Allah) will not be successful."