The word(s) "illa" appears 62 time(s) in 59 verse(s) in Quran in Mohsin Khan translation.

(31) And (remember) when We showed Ibrahim (Abraham) the site of the (Sacred) House (the Ka'bah at Makkah) (saying): "Associate not anything (in worship) with Me, [La ilaha illallah (none has the right to be worshipped but Allah) - Islamic Monotheism], and sanctify My House for those who circumambulate it, and those who stand up (for prayer), and those who bow (submit themselves with humility and obedience to Allah), and make prostration (in prayer);"

(32) 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.

(33) Hunafa' Lillah (i.e. worshiping none but Allah), not associating partners (in worship) unto Him; and whoever assigns partners to Allah, it is as if he had fallen from the sky, and the birds had snatched him, or the wind had thrown him to a far off place.

(34) So Exalted be Allah, the True King: La ilaha illa Huwa (none has the right to be worshipped but He), the Lord of the Supreme Throne!

(35) On the Day they will see the angels - no glad tidings will there be for the Mujrimun (criminals, disbelievers, polytheists, sinners) that day. And they (angels) will say: "All kinds of glad tidings are forbidden to you," [none will be allowed to enter Paradise except the one who said: La ilaha illallah, "(none has the right to be worshipped but Allah) and acted practically on its legal orders and obligations. See the footnote of V.2:193)].

(36) Allah, La ilaha illa Huwa (none has the right to be worshipped but He), the Lord of the Supreme Throne!

(37) And He is Allah: La ilaha illa Huwa (none has the right to be worshipped but He), all praises and thanks be to Him (both) in the first (i.e. in this world) and in the last (i.e. in the Hereafter). And for Him is the Decision, and to Him shall you (all) be returned.

(38) And invoke not any other ilah (god) along with Allah: La ilaha illa Huwa (none has the right to be worshipped but He). Everything will perish save His Face. His is the Decision, and to Him you (all) shall be returned.

(39) So set you (O Muhammad صلى الله عليه وسلم) your face towards the religion (of pure Islamic Monotheism) Hanif (worship none but Allah Alone). Allah's Fitrah (i.e. Allah's Islamic Monotheism) with which He has created mankind. No change let there be in Khalq-illah (i.e. the religion of Allah - Islamic Monotheism): that is the straight religion, but most of men know not. [Tafsir At-Tabari]

(40) He has created the heavens without any pillars that you see, and has set on the earth firm mountains lest it should shake with you. And He has scattered therein moving (living) creatures of all kinds. And We send down water (rain) from the sky, and We cause (plants) of every goodly kind to grow therein.