The word(s) "merges" appears 8 time(s) in 4 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) That is because Allah merges night into day, and He merges day into night, and verily it is Allah Who hears and sees (all things).

(2) Seest thou not that Allah merges Night into Day and he merges Day into Night; that He has subjected the sun, and the moon (to his Law), each running its course for a term appointed; and that Allah is well-acquainted with all that ye do?

(3) He merges Night into Day, and he merges Day into Night, and he has subjected the sun and the moon (to his Law): each one runs its course for a term appointed. Such is Allah your Lord: to Him belongs all Dominion. And those whom ye invoke besides Him have not the least power.

(4) He merges Night into Day, and He merges Day into Night; and He has full knowledge of the secrets of (all) hearts.