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

(451) Verily, those who disbelieve, and hinder (men) from the Path of Allah (i.e. Islam), and oppose the Messenger (صلى الله عليه وسلم) (by standing against him and hurting him), after the guidance has been clearly shown to them, they will not harm Allah in the least, but He will make their deeds fruitless,

(452) They are the ones who disbelieved (in the Oneness of Allah - Islamic Monotheism) and hindered you from Al-Masjid-al-Haram (at Makkah) and detained the sacrificial animals from reaching their place of sacrifice. Had there not been believing men and believing women whom you did not know, that you may kill them and on whose account a sin would have been committed by you without (your) knowledge, that Allah might bring into His Mercy whom He wills - if they (the believers and the disbelievers) had been apart, We verily would have punished those of them who disbelieved with painful torment.

(453) O you who believe! Let not a group scoff at another group, it may be that the latter are better than the former. Nor let (some) women scoff at other women, it may be that the latter are better than the former. Nor defame one another, nor insult one another by nicknames. How bad is it to insult one's brother after having Faith [i.e. to call your Muslim brother (a faithful believer) as: "O sinner", or "O wicked"]. And whosoever does not repent, then such are indeed Zalimun (wrong-doers, etc.).

(454) Qaf. [These letters (Qaf, etc.) are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings]. by the Glorious Qur'an.

(455) And indeed We have created man, and We know what his ownself whispers to him. And We are nearer to him than his jugular vein (by Our Knowledge).

(456) Not a word does he (or she) utter but there is a watcher by him ready (to record it).

(457) (It will be said): "This is what you were promised - (it is) for those oft-returning (to Allah) in sincere repentance, and those who preserve their covenant with Allah (by obeying Him in all what He has ordered, and worshipping none but Allah Alone, i.e. follow Allah's religion - Islamic Monotheism).

(458) We know best what they say. And you (O Muhammad صلى الله عليه وسلم) are not the one to force them (to Belief). But warn by the Qur'an; him who fears My Threat.

(459) by (the winds) that scatter dust.

(460) And those (angels) who distribute (provisions, rain, and other blessings) by (Allah's) Command.