The word(s) "ruh-ul-qudus" appears 4 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) And indeed, We gave Musa (Moses) the Book and followed him up with a succession of Messengers. And We gave 'Îsa (Jesus), the son of Maryam (Mary), clear signs and supported him with ruh-ul-qudus [Jibrael (Gabriel عليه السلام)]. Is it that whenever there came to you a Messenger with what you yourselves desired not, you grew arrogant? Some you disbelieved and some you killed.

(2) Those Messengers! We preferred some of them to others; to some of them Allah spoke (directly); others He raised to degrees (of honour); and to 'Îsa (Jesus), the son of Maryam (Mary), We gave clear proofs and evidence, and supported him with ruh-ul-qudus [Jibrael (Gabriel)]. If Allah had willed, succeeding generations would not have fought against each other, after clear Verses of Allah had come to them, but they differed - some of them believed and others disbelieved. If Allah had willed, they would not have fought against one another, but Allah does what He likes.

(3) (Remember) when Allah will say (on the Day of Resurrection). "O 'Îsa (Jesus), son of Maryam (Mary)! Remember My Favour to you and to your mother when I supported you with ruh-ul-qudus [Jibril (Gabriel)] so that you spoke to the people in the cradle and in maturity; and when I taught you writing, Al-Hikmah (the power of understanding), the Taurat (Torah) and the Injeel (Gospel); and when you made out of the clay a figure like that of a bird, by My Permission, and you breathed into it, and it became a bird by My Permission, and you healed those born blind, and the lepers by My Permission, and when you brought forth the dead by My Permission; and when I restrained the Children of Israel from you (when they resolved to kill you) as you came unto them with clear proofs, and the disbelievers among them said: 'This is nothing but evident magic.'"

(4) Say (O Muhammad صلى الله عليه و سلم) ruh-ul-qudus [Jibril (Gabriel)] has brought it (the Qur'an) down from your Lord with truth, that it may make firm and strengthen (the Faith of) those who believe, and as a guidance and glad tidings to those who have submitted (to Allah as Muslims).