The word(s) "rivalry" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) And they were not divided until after the knowledge came unto them, through rivalry among themselves; and had it not been for a Word that had already gone forth from thy Lord for an appointed term, it surely had been judged between them. And those who were made to inherit the Scripture after them are verily in hopeless doubt concerning it.

(2) And gave them plain commandments. And they differed not until after the knowledge came unto them, through rivalry among themselves. Lo! thy Lord will judge between them on the Day of Resurrection concerning that wherein they used to differ.

(3) Know that the life of the world is only play, and idle talk, and pageantry, and boasting among you, and rivalry in respect of wealth and children; as the likeness of vegetation after rain, whereof the growth is pleasing to the husbandman, but afterward it drieth up and thou seest it turning yellow, then it becometh straw. And in the Hereafter there is grievous punishment, and (also) forgiveness from Allah and His good pleasure, whereas the life of the world is but matter of illusion.

(4) rivalry in worldly increase distracteth you