The word(s) "ishaq" appears 17 time(s) in 16 verse(s) in Quran in Mohsin Khan translation.

(1) Or were you witnesses when death approached Ya'qub (Jacob)? When he said unto his sons, "What will you worship after me?" They said, "We shall worship your Ilah (God - Allah), the Ilah (God) of your fathers, Ibrahim (Abraham), Isma'il (Ishmael), ishaq (Isaac), One Ilah (God), and to Him we submit (in Islam)."

(2) Say (O Muslims), "We believe in Allah and that which has been sent down to us and that which has been sent down to Ibrahim (Abraham), Isma'il (Ishmael), ishaq (Isaac), Ya'qub (Jacob), and to Al-Asbat [the offspring of the twelve sons of Ya'qub (Jacob)], and that which has been given to Musa (Moses) and 'Îsa (Jesus), and that which has been given to the Prophets from their Lord. We make no distinction between any of them, and to Him we have submitted (in Islam)."

(3) Or say you that Ibrahim (Abraham), Isma'il (Ishmael), ishaq (Isaac), Ya'qub (Jacob) and Al-Asbat [the offspring of the twelve sons of Ya'qub (Jacob)] were Jews or Christians? Say, "Do you know better or does Allah (knows better ... that they all were Muslims)? And who is more unjust than he who conceals the testimony [i.e. to believe in Prophet Muhammad صلى الله عليه وسلم when he comes, as is written in their Books. (See Verse 7:157)] he has from Allah? And Allah is not unaware of what you do."

(4) Say (O Muhammad صلى الله عليه وسلم): "We believe in Allah and in what has been sent down to us, and what was sent down to Ibrahim (Abraham), Isma'il (Ishmael), ishaq (Isaac), Ya'qub (Jacob) and Al-Asbat [the offspring of the twelve sons of Ya'qub (Jacob)] and what was given to Musa (Moses), 'Îsa (Jesus) and the Prophets from their Lord. We make no distinction between one another among them and to Him (Allah) we have submitted (in Islam)."

(5) Verily, We have sent the revelation to you (O Muhammad صلى الله عليه وسلم) as We sent the revelation to Nuh (Noah) and the Prophets after him; We (also) sent the revelation to Ibrahim (Abraham), Isma'il (Ishmael), ishaq (Isaac), Ya'qub (Jacob), and Al-Asbat [the offspring of the twelve sons of Ya'qub (Jacob)], 'Îsa (Jesus), Ayyub (Job), Yunus (Jonah), Harun (Aaron), and Sulaiman (Solomon); and to Dawud (David) We gave the Zabur (Psalms).

(6) And We bestowed upon him ishaq (Isaac) and Ya'qub (Jacob), each of them We guided, and before him, We guided Nuh (Noah), and among his progeny Dawud (David), Sulaiman (Solomon), Ayyub (Job), Yusuf (Joseph), Musa (Moses), and Harun (Aaron). Thus do We reward Al-Muhsinun (the good-doers - see the footnote of V.9: 120).

(7) And his wife was standing (there), and she laughed [either, because the messengers did not eat their food or for being glad for the destruction of the people of Lut (Lot)]. But We gave her glad tidings of ishaq (Isaac), and after ishaq, of Ya'qub (Jacob).

(8) "Thus will your Lord choose you and teach you the interpretation of dreams (and other things) and perfect His Favour on you and on the offspring of Ya'qub (Jacob), as He perfected it on your fathers, Ibrahim (Abraham) and ishaq (Isaac) aforetime! Verily, your Lord is All-Knowing, All-Wise."

(9) "And I have followed the religion of my fathers, - Ibrahim (Abraham), ishaq (Isaac) and Ya'qub (Jacob) [عليهم السلام], and never could we attribute any partners whatsoever to Allah. This is from the Grace of Allah to us and to mankind, but most men thank not (i.e. they neither believe in Allah, nor worship Him).

(10) "All the praises and thanks be to Allah, Who has given me in old age Isma'il (Ishmael) and ishaq (Isaac). Verily! My Lord is indeed the All-Hearer of invocations.