The word(s) "perceive" appears 28 time(s) in 28 verse(s) in Quran in Mohsin Khan translation.

(11) Those before them indeed plotted, but Allah struck at the foundation of their building, and then the roof fell down upon them, from above them, and the torment overtook them from directions they did not perceive.

(12) Do then those who devise evil plots feel secure that Allah will not sink them into the earth, or that the torment will not seize them from directions they perceive not?

(13) Then, when they perceived (saw) Our Torment (coming), behold, they (tried to) flee from it.

(14) We hasten unto them with good things. Nay, [it is a Fitnah (trial) in this worldly life so that they will have no share of good things in the Hereafter] but they perceive not. [Tafsir Al-Qurtubi].

(15) It shall come to them of a sudden, while they perceive it not.

(16) Till, when they came to the valley of the ants, one of the ants said: "O ants! Enter your dwellings, lest Sulaiman (Solomon) and his hosts should crush you, while they perceive not."

(17) So they plotted a plot, and We plotted a plot, while they perceived not.

(18) Say: "None in the heavens and the earth knows the Ghaib (Unseen) except Allah, nor can they perceive when they shall be resurrected."

(19) And the wife of Fir'aun (Pharaoh) said: "A comfort of the eye for me and for you. Kill him not, perhaps he may be of benefit to us, or we may adopt him as a son." And they perceived not (the result of that).

(20) And she said to his [Musa's (Moses)] sister: "Follow him." So she (his sister) watched him from a far place secretly, while they perceived not.