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

(71) (Moses) said: If I ask thee after this concerning aught, keep not company with me. Thou hast received an excuse from me.

(72) So (it was). And We knew all concerning him.

(73) Such was Jesus, son of Mary: (this is) a statement of the truth concerning which they doubt.

(74) And David and Solomon, when they gave judgment concerning the field, when people's sheep had strayed and browsed therein by night; and We were witnesses to their judgment.

(75) Among mankind is he who disputeth concerning Allah without knowledge, and followeth each froward devil;

(76) O mankind! if ye are in doubt concerning the Resurrection, then lo! We have created you from dust, then from a drop of seed, then from a clot, then from a little lump of flesh shapely and shapeless, that We may make (it) clear for you. And We cause what We will to remain in the wombs for an appointed time, and afterward We bring you forth as infants, then (give you growth) that ye attain your full strength. And among you there is he who dieth (young), and among you there is he who is brought back to the most abject time of life, so that, after knowledge, he knoweth naught. And thou (Muhammad) seest the earth barren, but when We send down water thereon, it doth thrill and swell and put forth every lovely kind (of growth).

(77) And among mankind is he who disputeth concerning Allah without knowledge or guidance or a scripture giving light,

(78) These twain (the believers and the disbelievers) are two opponents who contend concerning their Lord. But as for those who disbelieve, garments of fire will be cut out for them; boiling fluid will be poured down on their heads,

(79) Allah will judge between you on the Day of Resurrection concerning that wherein ye used to differ.

(80) Lo! those who love that slander should be spread concerning those who believe, theirs will be a painful punishment in the world and the Hereafter. Allah knoweth. Ye know not.