The word(s) "dhul-hijjah" appears 4 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) And a declaration from Allah and His Messenger to mankind on the greatest day (the 10th of dhul-hijjah - the 12th month of Islamic calendar) that Allah is free from (all) obligations to the Mushrikun (See V.2:105) and so is His Messenger. So if you (Mushrikun ) repent, it is better for you, but if you turn away, then know that you cannot escape (from the Punishment of) Allah. And give tidings (O Muhammad صلى الله عليه وسلم) of a painful torment to those who disbelieve.

(2) That they may witness things that are of benefit to them (i.e. reward of Hajj in the Hereafter, and also some worldly gain from trade), and mention the Name of Allah on appointed days (i.e. 10th, 11th, 12th, and 13th day of dhul-hijjah), over the beast of cattle that He has provided for them (for sacrifice), [at the time of their slaughtering by saying: (Bismillah, Wallahu-Akbar, Allahumma Minka wa Ilaik).] Then eat thereof and feed therewith the poor having a hard time.

(3) And by the Witnessing day (i.e. Friday), and by the Witnessed day [i.e. the day of 'Arafat (Hajj) the ninth of dhul-hijjah];

(4) By the ten nights (i.e. the first ten days of the month of dhul-hijjah) ,