The word(s) "ilaha" appears 52 time(s) in 51 verse(s) in Quran in Mohsin Khan translation.

(11) Indeed, We sent Nuh (Noah) to his people and he said: "O my people! Worship Allah! You have no other Ilah (God) but Him. (La ilaha illallah: none has the right to be worshipped but Allah). Certainly, I fear for you the torment of a Great Day!"

(12) And to 'Ad (people, We sent) their brother Hud. He said: "O my people! Worship Allah! You have no other Ilah (God) but Him. (La ilaha illallah: none has the right to be worshipped but Allah). Will you not fear (Allah)?"

(13) And to Thamud (people, We sent) their brother Salih. He said: "O my people! Worship Allah! You have no other Ilah (God) but Him. (La ilaha illallah: none has the right to be worshipped but Allah). Indeed there has come to you a clear sign (the miracle of the coming out of a huge she-camel from the midst of a rock) from your Lord. This she-camel of Allah is a sign unto you; so you leave her to graze in Allah's earth, and touch her not with harm, lest a painful torment should seize you.

(14) And to (the people of) Madyan (Midian), (We sent) their brother Shu'aib. He said: "O my people! Worship Allah! You have no other Ilah (God) but Him. [La ilaha illallah (none has the right to be worshipped but Allah)]." Verily, a clear proof (sign) from your Lord has come unto you; so give full measure and full weight and wrong not men in their things, and do not do mischief on the earth after it has been set in order, that will be better for you, if you are believers.

(15) Say (O Muhammad صلى الله عليه وسلم): "O mankind! Verily, I am sent to you all as the Messenger of Allah - to Whom belongs the dominion of the heavens and the earth. La ilaha illa Huwa (none has the right to be worshipped but He). It is He Who gives life and causes death. So believe in Allah and His Messenger (Muhammad صلى الله عليه وسلم), the Prophet who can neither read nor write (i.e. Muhammad صلى الله عليه وسلم), who believes in Allah and His Words [(this Qur'an), the Taurat (Torah) and the Injeel (Gospel) and also Allah's Word: "Be!" - and he was, i.e. 'Îsa (Jesus) son of Maryam (Mary), عليهما السلام], and follow him so that you may be guided. "

(16) They (Jews and Christians) took their rabbis and their monks to be their lords besides Allah (by obeying them in things which they made lawful or unlawful according to their own desires without being ordered by Allah), and (they also took as their Lord) Messiah, son of Maryam (Mary), while they (Jews and Christians) were commanded [in the Taurat (Torah) and the Injeel (Gospel)] to worship none but One Ilah (God - Allah) La ilaha illa Huwa (none has the right to be worshipped but He) . Praise and glory be to Him (far above is He) from having the partners they associate (with Him)."

(17) But if they turn away, say (O Muhammad صلى الله عليه وسلم): "Allah is sufficient for me. La ilaha illa Huwa (none has the right to be worshipped but He) in Him I put my trust and He is the Lord of the Mighty Throne."

(18) If then they answer you not, know then that it [the Revelation (this Qur'an)] is sent down with the Knowledge of Allah and that La ilaha illa Huwa: (none has the right to be worshipped but He)! Will you then be Muslims (those who submit in Islam)?

(19) Thus have We sent you (O Muhammad صلى الله عليه و سلم) to a community before whom other communities have passed away, in order that you might recite unto them what We have revealed to you, while they disbelieve in the Most Gracious (Allah) Say: "He is my Lord! La ilaha illa Huwa (none has the right to be worshipped but He)! In Him is my trust, and to Him will be my return with repentance."

(20) He sends down the angels with the Ruh (revelation) of His Command to whom of His slaves He wills (saying): "Warn mankind that La ilaha illa Ana (none has the right to be worshipped but I), so fear Me (by abstaining from sins and evil deeds).