The word(s) "unity" appears 5 time(s) in 5 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) A (declaration) of immunity from Allah and His Messenger, to those of the Pagans with whom ye have contracted mutual alliances:-

(2) Or think ye that ye shall be abandoned, as though Allah did not know those among you who strive with might and main, and take none for friends and protectors except Allah, His Messenger, and the (community of) Believers? But Allah is well-acquainted with (all) that ye do.

(3) But (later generations) cut off their affair (of unity), one from another: (yet) will they all return to Us.

(4) But people have cut off their affair (of unity), between them, into sects: each party rejoices in that which is with itself.

(5) Are your Unbelievers, (O Quraish), better than they? Or have ye an immunity in the Sacred Books?