سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
I.e., the spiritual and social obligations arising from their faith.
Cf. xxii. 29. The vows must be vows of spiritual service, which of course includes service to humanity, such as is mentioned in the next verse. They are Devotees of Allah, and they must perform all vows and contracts (v. I and n. 682). Vows of the Pagan sort, savouring of a sort of "bribe" to the Deity, are not approved.
That is, they prepare for the Judgment to come, where the effects of Sin will not be transitory but far-reaching.
They: i.e., the Righteous: they are known in the present life by the virtues described in verses 7-10, and in the life of the Hereafter they will enjoy the Bliss described in verses 11-22.