The word(s) "empty" appears 4 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) (They will be) hastening forward with necks outstretched, their heads raised up (towards the sky), their gaze returning not towards them and their hearts empty (from thinking because of extreme fear).

(2) And the heart of the mother of Musa (Moses) became empty [from every thought, except the thought of Musa (Moses)]. She was very near to disclose his (case, i.e. the child is her son), had We not strengthened her heart (with Faith), so that she might remain as one of the believers.

(3) And has cast out all that was in it and became empty.

(4) And He made them like (an empty field of) stalks (of which the corn has been eaten up by cattle).