Tafsir of Al-Lail 92:7

We will prepare him for the trait that leads to ease and comfort, such as entering Paradise and its precursors. It is derived from the expression "I facilitated the horse for riding" when one saddles and bridles it. Describing it as al-yusra (the easiest/the ease) is either based on an explicit metaphor (isti'arah musarrahah), a synecdoche (majaz mursal), or a figurative attribution (taja wuz fi al-isnad).