The word(s) "assert" appears 6 time(s) in 6 verse(s) in Quran in Mohsin Khan translation.

(1) And on the Day when We shall gather them all together, then We shall say to those who joined partners (in worship with Us): "Where are your partners (false deities) whom you used to assert (as partners in worship with Allah)?"

(2) They assign to Allah that which they dislike (for themselves), and their tongues assert the falsehood that the better things will be theirs. No doubt for them is the Fire, and they will be the first to be hastened on into it, and left there neglected. (Tafsir Al-Qurtubi)

(3) Say (O Muhammad صلى الله عليه و سلم to these polytheists, pagans): "If there had been other alihah (gods) along with Him as they assert, then they would certainly have sought out a way to the Lord of the Throne (seeking His Pleasures and to be near to Him).

(4) And (remember) the Day when He will call to them and say: "Where are My (so-called) partners whom you used to assert?"

(5) And (remember) the Day when He (your Lord - Allah) will call to them (those who worshipped others along with Allah), and will say: "Where are My (so-called) partners, whom you used to assert?"

(6) Say: (O Muhammad صلى الله عليه وسلم to polytheists, pagans) "Call upon those whom you assert (to be associate gods) besides Allah, they possess not even an atom's (or a small ant's) weight either in the heavens or on the earth, nor have they any share in either, nor there is for Him any supporter from among them.