The word(s) "by" appears 450 time(s) in 398 verse(s) in Quran in Muhammad Habib Shakir translation.

(331) They shall not be affected with headache thereby, nor shall they get exhausted,

(332) But nay! I swear by the falling of stars;

(333) A revelation by the Lord of the worlds.

(334) (As for) those of you who put away their wives by likening their backs to the backs of their mothers, they are not their mothers; their mothers are no others than those who gave them birth; and most surely they utter a hateful word and a falsehood and most surely Allah is Pardoning, Forgiving.

(335) And (as for) those who put away their wives by likening their backs to the backs of their mothers then would recall what they said, they should free a captive before they touch each other; to that you are admonished (to conform); and Allah is Aware of what you do.

(336) Whatever palm-tree you cut down or leave standing upon its roots, It is by Allah's command, and that He may abase the transgressors.

(337) Whatever Allah has restored to His Apostle from the people of the towns, it is for Allah and for the Apostle, and for the near of kin and the orphans and the needy and the wayfarer, so that it may not be a thing taken by turns among the rich of you, and whatever the Apostle gives you, accept it, and from whatever he forbids you, keep back, and be careful of (your duty to) Allah; surely Allah is severe in retributing (evil):

(338) Those who disbelieve think that they shall never be raised. Say: Aye! by my Lord! you shall most certainly be raised, then you shall most certainly be informed of what you did; and that is easy to Allah.

(339) No affliction comes about but by Allah's permission; and whoever believes in Allah, He guides aright his heart; and Allah is Cognizant of all things.

(340) Noon. I swear by the pen and what the angels write,