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

(251) "Those whose lives the angels take while they are doing wrong to themselves (by disbelief and by associating partners in worship with Allah and by committing all kinds of crimes and evil deeds)." Then, they will make (false) submission (saying): "We used not to do any evil." (The angels will reply): "Yes! Truly, Allah is All-Knower of what you used to do.

(252) And they swear by Allah their strongest oaths, that Allah will not raise up him who dies. Yes, (He will raise them up), - a promise (binding) upon Him in truth, but most of mankind know not.

(253) And they assign a portion of that which We have provided them unto what they know not (false deities). by Allah, you shall certainly be questioned about (all) that you used to fabricate.

(254) by Allah, We indeed sent (Messengers) to the nations before you (O Muhammad صلى الله عليه و سلم), but Shaitan (Satan) made their deeds fair-seeming to them. So he (Satan) is their Wali (helper) today (i.e. in this world), and theirs will be a painful torment.

(255) And Allah has preferred some of you above others in wealth and properties. Then, those who are preferred will by no means hand over their wealth and properties to those (slaves) whom their right hands possess, so that they may be equal with them in respect thereof . Do they then deny the Favour of Allah?

(256) And Allah has made for you Azwaj (mates or wives) of your own kind, and has made for you, from your wives, sons and grandsons, and has bestowed on you good provision. Do they then believe in false deities and deny the Favour of Allah (by not worshipping Allah Alone).

(257) Allah puts forward the example of (two men - a believer and a disbeliever); a slave (disbeliever) under the possession of another, he has no power of any sort, and (the other), a man (believer) on whom We have bestowed a good provision from Us, and he spends thereof secretly and openly. Can they be equal? (by no means). All the praises and thanks are to Allah. Nay! (But) most of them know not.

(258) They recognise the Grace of Allah, yet they deny it (by worshipping others besides Allah) and most of them are disbelievers (deny the Prophethood of Muhammad صلى الله عليه و سلم).

(259) Those who disbelieved and hinder (men) from the Path of Allah, for them We will add torment to the torment because they used to spread corruption [by disobeying Allah themselves, as well as ordering others (mankind) to do so].

(260) Verily, Allah enjoins Al-'Adl (i.e. justice and worshipping none but Allah Alone - Islamic Monotheism) and Al-Ihsan [i.e. to be patient in performing your duties to Allah, totally for Allah's sake and in accordance with the Sunnah (legal ways) of the Prophet صلى الله عليه وسلم in a perfect manner], and giving (help) to kith and kin (i.e. all that Allah has ordered you to give them e.g., wealth, visiting, looking after them, or any other kind of help), and forbids Al-Fahsha' (i.e all evil deeds, e.g. illegal sexual acts, disobedience of parents, polytheism, to tell lies, to give false witness, to kill a life without right), and Al-Munkar (i.e all that is prohibited by Islamic law: polytheism of every kind, disbelief and every kind of evil deeds), and Al-Baghy (i.e. all kinds of oppression). He admonishes you, that you may take heed.