This so respects not so much the desire and expectation of a hired servant, which is expressed Job_7:2, as the ground and reason of it, which is plainly implied there, to wit, his hard toil and service, which makes him thirst after rest.
I am made to possess; God, by his sovereign power and providence, hath given me this as my lot and inheritance. Months; so he calls them rather than days, to note either the irksomeness and tediousness of his affliction, whereby every day seemed a month to him; or their length and continuance, which, as some infer from hence, had now been upon him some months.
Of vanity; empty and unsatisfying, or false and deceitful, not giving me that ease and rest which they promised me, and I expected.
Wearisome nights: he mentions nights, because that is the saddest time for sick and miserable persons; the darkness and solitude of the night being of themselves uncomfortable, and giving them more opportunity for solemn and sorrowful thoughts and reflections upon their own miseries.