The word(s) "which" appears 877 time(s) in 758 verse(s) in Quran in Mohsin Khan translation.

(1) This is the Book (the Qur'an), whereof there is no doubt, a guidance to those who are Al-Muttaqun [the pious believers of Islamic Monotheism who fear Allah much (abstain from all kinds of sins and evil deeds which He has forbidden) and love Allah much (perform all kinds of good deeds which He has ordained)].

(2) And who believe in (the Qur'an and the Sunnah ) which has been sent down (revealed) to you (O Muhammad صلى الله عليه وسلم) and in that which was sent down before you [the Taurat (Torah) and the Injeel (Gospel), etc.] and they believe with certainty in the Hereafter. (Resurrection, recompense of their good and bad deeds, Paradise and Hell).

(3) And if you (Arab pagans, Jews, and Christians) are in doubt concerning that which We have sent down (i.e. the Qur'an) to Our slave (Muhammad صلى الله عليه وسلم), then produce a Surah (chapter) of the like thereof and call your witnesses (supporters and helpers) besides Allah, if you are truthful.

(4) And give glad tidings to those who believe and do righteous good deeds, that for them will be Gardens under which rivers flow (Paradise). Every time they will be provided with a fruit therefrom, they will say: "This is what we were provided with before," and they will be given things in resemblance (i.e. in the same form but different in taste) and they shall have therein Azwajun Mutahharatun (purified mates or wives) and they will abide therein forever.

(5) And (remember) when your Lord said to the angels: "Verily, I am going to place (mankind) generations after generations on earth." They said: "Will You place therein those who will make mischief therein and shed blood, - while we glorify You with praises and thanks and sanctify You." He (Allah) said: "I know that which you do not know."

(6) Then the Shaitan (Satan) made them slip therefrom (the Paradise), and got them out from that in which they were. We said: "Get you down, all, with enmity between yourselves. On earth will be a dwelling place for you and an enjoyment for a time."

(7) O Children of Israel! Remember My Favour which I bestowed upon you, and fulfil (your obligations to) My Covenant (with you) so that I fulfil (My Obligations to) your covenant (with Me), and fear none but Me.

(8) And believe in what I have sent down (this Qur'an), confirming that which is with you, [the Taurat (Torah) and the Injeel (Gospel)], and be not the first to disbelieve therein, and buy [get (تاخذ اجرا)] not with My Verses [the Taurat (Torah) and the Injeel (Gospel)] a small price (i.e. getting a small gain by selling My Verses), and fear Me and Me Alone. (Tafsir At-Tabari ).

(9) O Children of Israel! Remember My Favour which I bestowed upon you and that I preferred you to the 'Alamin [mankind and jinn (of your time period, in the past)].

(10) But those who did wrong changed the word from that which had been told to them for another, so We sent upon the wrong-doers Rijz (a punishment) from the heaven because of their rebelling against Allah's obedience. (Tafsir At-Tabari).