The word(s) "concern" appears 154 time(s) in 144 verse(s) in Quran in Muhammad Pickthal translation.

(51) Who doeth greater wrong than he who inventeth a lie concerning Allah? Such will be brought before their Lord, and the witnesses will say: These are they who lied concerning their Lord. Now the curse of Allah is upon wrong-doers,

(52) And O my people! I ask of you no wealth therefor. My reward is the concern only of Allah, and I am not going to thrust away those who believe - Lo! they have to meet their Lord! - but I see you a folk that are ignorant.

(53) O my people! I ask of you no reward for it. Lo! my reward is the concern only of Him Who made me. Have ye then no sense?

(54) They said: O Salih! Thou hast been among us hitherto as that wherein our hope was placed. Dost thou ask us not to worship what our fathers worshipped? Lo! we verily are in grave doubt concerning that to which thou callest us.

(55) So be not thou in doubt concerning that which these (folk) worship. They worship only as their fathers worshipped aforetime. Lo! we shall pay them their whole due unabated.

(56) And we verily gave unto Moses the Scripture, and there was strife thereupon; and had it not been for a Word that had already gone forth from thy Lord, the case would have been judged between them, and lo! they are in grave doubt concerning it.

(57) O my two fellow-prisoners! As for one of you, he will pour out wine for his lord to drink; and as for the other, he will be crucified so that the birds will eat from his head. Thus is the case judged concerning which ye did inquire.

(58) Go, O my sons, and ascertain concerning Joseph and his brother, and despair not of the Spirit of Allah. Lo! none despaireth of the Spirit of Allah save disbelieving folk.

(59) The thunder hymneth His praise and (so do) the angels for awe of Him. He launcheth the thunderbolts and smiteth with them whom He will while they dispute (in doubt) concerning Allah, and He is mighty in wrath.

(60) Hath not the history of those before you reached you: the folk of Noah, and (the tribes of) A'ad and Thamud, and those after them? None save Allah knoweth them. Their messengers came unto them with clear proofs, but they thrust their hands into their mouths, and said: Lo! we disbelieve in that wherewith ye have been sent, and lo! we are in grave doubt concerning that to which ye call us.