(40) The frost by night.--From September to May the nights in the East are usually cold, and the change from great heat by day to a freezing temperature as soon as the sun sets is very trying to health.

31:36-42 If Jacob were willingly consumed with heat in the day, and frost by night, to become the son-in-law of Laban, what should we refuse to endure, to become the sons of God? Jacob speaks of God as the God of his father; he thought himself unworthy to be regarded, but was beloved for his father's sake. He calls him the God of Abraham, and the fear of Isaac; for Abraham was dead, and gone to that world where perfect love casts out fear; but Isaac was yet alive, sanctifying the Lord in his heart, as his fear and his dread.Thus I was,.... In such a situation, as well as in the following uncomfortable plight and condition:

in the day the drought consumed me, and the frost by night: the violent heat in the daytime scorched him, and the severe frosts in the night pinched him: that is, in the different seasons of the year, the heat of the day in the summertime, and the cold of the night in the wintertime; for it cannot well be thought that there should be excessive heat in the day and sharp frosts in the night, in the same season of the year: it looks as if Laban did not allow Jacob the proper conveniencies of clothes, and of tents to secure him from the inclemency of the weather, which other shepherds usually had:

and my sleep departed from mine eyes; through diligent care and watchfulness of the flocks in the night season, which on some occasions were necessary; see Luke 2:8.