لِيُنْفِقْ ذُو سَعَةٍ مِنْ سَعَتِهِ
Let the person of means spend according to his means.
لِـ: the lām of command, which governs the jussive.
يُنْفِقْ: an imperfect verb in the jussive, marked by sukūn.
ذُو: the subject, nominative with wāw because it belongs to the five nouns; it is in a construct.
سَعَةٍ: the genitive possessor; “مِنْ سَعَتِهِ” clarifies the source and extent of expenditure.
This is from Qurʾān 65:7. Though the verb is formally imperfect, the lām of command changes the meaning from “he spends” to a directive that he should spend.