The word(s) "by" appears 750 time(s) in 615 verse(s) in Quran in Mohsin Khan translation.

(541) And by the winds that blow violently.

(542) And by the winds that scatter clouds and rain.

(543) And by the Verses (of the Qur'an) that separate the right from the wrong.

(544) And by the angels that bring the revelations to the Messengers,

(545) For a known period (determined by gestation)?

(546) A dwelling place for the Taghun (those who transgress the boundary limits set by Allah like polytheists, disbelievers in the Oneness of Allah, hyprocrites, sinners, criminals),

(547) (From) the Lord of the heavens and the earth, and whatsoever is in between them, the Most Gracious, with Whom they cannot dare to speak (on the Day of Resurrection except by His Leave).

(548) That is (without doubt) the True Day. So, whosoever wills, let him seek a place with (or a way to) His Lord (by obeying Him in this worldly life)!

(549) by those (angels) who pull out (the souls of the disbelievers and the wicked) with great violence.

(550) by those (angels) who gently take out (the souls of the believers).