The word(s) "arab" appears 56 time(s) in 49 verse(s) in Quran in Mohsin Khan translation.

(11) Verily, We have sent it down as an arabic Qur'an in order that you may understand.

(12) He sends down water (rain) from the sky, and the valleys flow according to their measure, but the flood bears away the foam that mounts up to the surface - and (also) from that (ore) which they heat in the fire in order to make ornaments or utensils, rises a foam like unto it, thus does Allah (by parables) show forth truth and falsehood . Then, as for the foam it passes away as scum upon the banks, while that which is for the good of mankind remains in the earth. Thus Allah sets forth parables (for the truth and falsehood, i.e. Belief and disbelief).

(13) And thus have We sent it (the Qur'an) down to be a judgement of authority in arabic. Were you (O Muhammad صلى الله عليه و سلم) to follow their (vain) desires after the knowledge which has come to you, then you will not have any Wali (protector) or Waq (defender) against Allah.

(14) The parable of those who disbelieved in their Lord is that their works are as ashes, on which the wind blows furiously on a stormy day; they shall not be able to get aught of what they have earned. That is the straying, far away (from the Right Path).

(15) See you not how Allah sets forth a parable? A goodly word as a goodly tree, whose root is firmly fixed, and its branches (reach) to the sky (i.e. very high).

(16) Giving its fruit at all times, by the Leave of its Lord, and Allah sets forth parables for mankind in order that they may remember.

(17) And the parable of an evil word is that of an evil tree uprooted from the surface of earth, having no stability.

(18) "And you dwelt in the dwellings of men who wronged themselves, and it was clear to you how We had dealt with them. And We put forth (many) parables for you."

(19) And indeed We know that they (polytheists and pagans) say: "It is only a human being who teaches him (Muhammad صلى الله عليه و سلم)." The tongue of the man they refer to is foreign, while this (the Qur'an) is a clear arabic tongue.

(20) Glorified and Exalted be He! High above (the great falsehood) that they say! (i.e. forged statements that there are other gods along with Allah, but He is Allah, the One, the Self-Sufficient Master, Whom all creatures need. He begets not, nor was He begotten, and there is none comparable or coequal unto Him).