The word(s) "slid" appears 3 time(s) in 3 verse(s) in Quran in Muhammad Pickthal translation.

(1) And (remember) when We made a covenant with the Children of Israel, (saying): Worship none save Allah (only), and be good to parents and to kindred and to orphans and the needy, and speak kindly to mankind; and establish worship and pay the poor-due. Then, after that, ye slid back, save a few of you, being averse.

(2) And if ye slide back after the clear proofs have come unto you, then know that Allah is Mighty, Wise.

(3) Lo! those of you who turned back on the day when the two hosts met, Satan alone it was who caused them to backslide, because of some of that which they have earned. Now Allah hath forgiven them. Lo! Allah is Forgiving, Clement.