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

(561) And the man who believed said: "O my people! Follow me, I will guide you to the way of right conduct [i.e. guide you to Allah's religion of Islamic Monotheism with which Musa (Moses) has been sent].

(562) "You invite me to disbelieve in Allah (and in His Oneness), and to join partners in worship with Him of which I have no knowledge; and I invite you to the All-Mighty, the Oft-Forgiving!

(563) Verily those who dispute about the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, without any authority having come to them, there is nothing else in their breasts except pride [to accept you (Muhammad صلى الله عليه وسلم) as a Messenger of Allah and to obey you] . They will never have it (i.e. Prophethood which Allah has bestowed upon you). So seek refuge in Allah (O Muhammad صلى الله عليه وسلم from the arrogants). Verily, it is He Who is the All-Hearer, the All-Seer.

(564) Those who deny the Book (this Qur'an), and that with which We sent Our Messengers (i.e. to worship none but Allah Alone sincerely, and to reject all false deities and to confess resurrection after the death for recompense) they will come to know (when they will be cast into the Fire of Hell).

(565) And He shows you His Ayat (signs and proofs) (of His Oneness in all the above-mentioned things). which, then of the Ayat (signs and proofs) of Allah do you deny?

(566) Then when their Messengers came to them with clear proofs, they were glad (and proud) with that which they had of the knowledge (of worldly things). And that at which they used to mock, surrounded them (i.e. the punishment).

(567) Giving glad tidings [of Paradise to the one who believes in the Oneness of Allah (i.e. Islamic Monotheism) and fears Allah much (abstains from all kinds of sins and evil deeds) and loves Allah much (performing all kinds of good deeds which He has ordained)], and warning (of punishment in the Hell-Fire to the one who disbelieves in the Oneness of Allah), but most of them turn away, so they hear not.

(568) And they say: "Our hearts are under coverings (screened) from that to which you invite us; and in our ears is deafness, and between us and you is a screen: so work you (on your way); verily, we are working (on our way)."

(569) But if they turn away, then say (O Muhammad صلى الله عليه وسلم): "I have warned you of a Sa'iqah (a destructive awful cry, torment, hit, a thunderbolt) like the Sa'iqah which overtook 'Ad and Thamud (people)."

(570) When the Messengers came to them, from before them and behind them (saying): "Worship none but Allah", they said: "If our Lord had so willed, He would surely have sent down the angels. So indeed we disbelieve in that with which you have been sent."