The word(s) "before" appears 356 time(s) in 337 verse(s) in Quran in Mohsin Khan translation.

(51) And We have sent down to you (O Muhammad صلى الله عليه وسلم) the Book (this Qur'an) in truth, confirming the Scripture that came before it and Muhaymin (trustworthy in highness and a witness) over it (old Scriptures) . So judge among them by what Allah has revealed, and follow not their vain desires, diverging away from the truth that has come to you. To each among you, We have prescribed a law and a clear way. If Allah had willed, He would have made you one nation, but that (He) may test you in what He has given you; so compete in good deeds. The return of you (all) is to Allah; then He will inform you about that in which you used to differ.

(52) O you who believe! Take not as Auliya' (protectors and helpers) those who take your religion as a mockery and fun from among those who received the Scripture (Jews and Christians) before you, and nor from among the disbelievers; and fear Allah if you indeed are true believers.

(53) Say: "O people of the Scripture (Jews and Christians)! Do you criticize us for no other reason than that we believe in Allah, and in (the revelation) which has been sent down to us and in that which has been sent down before (us), and that most of you are Fasiqun [rebellious and disobedient (to Allah)]?"

(54) The Messiah ['Îsa (Jesus)], son of Maryam (Mary), was no more than a Messenger; many were the Messengers that passed away before him. His mother [Maryam (Mary)] was a Siddiqah [i.e. she believed in the Words of Allah and His Books (see Verse 66:12)]. They both used to eat food (as any other human being, while Allah does not eat). Look how We make the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) clear to them; yet look how they are deluded away (from the truth).

(55) Say (O Muhammad صلى الله عليه وسلم): "O people of the Scripture (Jews and Christians)! Exceed not the limits in your religion (by believing in something) other than the truth, and do not follow the vain desires of people who went astray before and who misled many, and strayed (themselves) from the Right Path."

(56) You see many of them taking the disbelievers as their Auliya' (protectors and helpers). Evil indeed is that which their ownselves have sent forward before them; for that (reason) Allah's Wrath fell upon them, and in torment they will abide.

(57) before you, a community asked such questions, then on that account they became disbelievers.

(58) Have they not seen how many a generation before them We have destroyed whom We had established on the earth such as We have not established you? And We poured out on them rain from the sky in abundance, and made the rivers flow under them. Yet We destroyed them for their sins, and We created after them other generations.

(59) And indeed (many) Messengers before you were mocked at, but their scoffers were surrounded by the very thing that they used to mock at.

(60) Nay, it has become manifest to them what they had been concealing before. But if they were returned (to the world), they would certainly revert to that which they were forbidden. And indeed they are liars.