The word(s) "vast" appears 3 time(s) in 3 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) Or (the Unbelievers' state) is like the depths of darkness in a vast deep ocean, overwhelmed with billow topped by billow, topped by (dark) clouds: depths of darkness, one above another: if a man stretches out his hands, he can hardly see it! for any to whom Allah giveth not light, there is no light!

(2) And in the 'Ad (people) (was another Sign): Behold, We sent against them the devastating Wind:

(3) With power and skill did We construct the Firmament: for it is We Who create the vastness of pace.