The word(s) "assert" appears 4 time(s) in 4 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) They stained his shirt with false blood. He said: "Nay, but your minds have made up a tale (that may pass) with you, (for me) patience is most fitting: Against that which ye assert, it is Allah (alone) Whose help can be sought"..

(2) They said: "If he steals, there was a brother of his who did steal before (him)." But these things did Joseph keep locked in his heart, revealing not the secrets to them. He (simply) said (to himself): "Ye are the worse situated; and Allah knoweth best the truth of what ye assert!"

(3) They attribute to Allah what they hate (for themselves), and their tongues assert the falsehood that all good things are for themselves: without doubt for them is the Fire, and they will be the first to be hastened on into it!

(4) The chiefs of the Unbelievers among his people said: "He is no more than a man like yourselves: his wish is to assert his superiority over you: if Allah had wished (to send messengers), He could have sent down angels; never did we hear such a thing (as he says), among our ancestors of old."