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

(531) And by the night when it withdraws.

(532) And by the dawn when it brightens.

(533) To any of you that chooses to go forward (by working righteous deeds), or to remain behind (by committing sins).

(534) I swear by the Day of Resurrection.

(535) And I swear by the self-reproaching person (a believer).

(536) And the sun and moon will be joined together (by going one into the other or folded up or deprived of their light).

(537) Does man think that he will be left neglected (without being punished or rewarded for the obligatory duties enjoined by his Lord Allah on him)?

(538) Verily, it is We Who have sent down the Qur'an to you (O Muhammad صلى الله عليه وسلم) by stages.

(539) Therefore be patient (O Muhammad صلى الله عليه وسلم) with constancy to the Command of your Lord (Allah, by doing your duty to Him and by conveying His Message to mankind), and obey neither a sinner nor a disbeliever among them.

(540) by the winds (or angels or the Messengers of Allah) sent forth one after another.