The word(s) "classes" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) Do not strain your eyes after what We have given certain classes of them to enjoy, and do not grieve for them, and make yourself gentle to the believers.

(2) And do not stretch your eyes after that with which We have provided different classes of them, (of) the splendor of this world's life, that We may thereby try them; and the sustenance (given) by your Lord is better and more abiding.