The word(s) "slippery" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) "It may be that my Lord will give me something better than your garden, and will send on it Husban (torment, bolt) from the sky, then it will be a barren slippery earth.

(2) O you who believe! Turn to Allah with sincere repentance! It may be that your Lord will expiate from you your sins, and admit you into Gardens under which rivers flow (Paradise) - the Day that Allah will not disgrace the Prophet (Muhammad صلى الله عليه وسلم) and those who believe with him. Their Light will run forward before them and (with their Records - Books of deeds) in their right hands. They will say: "Our Lord! Keep perfect our Light for us [and do not put it off till we cross over the Sirat (a slippery bridge over the Hell) safely] and grant us forgiveness. Verily, You are Able to do all things."

(3) I shall oblige him to (climb a slippery mountain in the Hell-fire called As-Sa'ud, or) face a severe torment!