Leviticus 26:3

“If ye walk in my statutes, and keep my commandments, and do them.] Both moral, ceremonial, and judicial, which had been delivered unto them, and now completely recorded in this and the preceding book; for what follow in the two next are chiefly repetitions of what are contained in these.”

“A BLESSING TO THE OBEDIENT. (Lev 26:3-13) If ye walk in my statutes--In that covenant into which God graciously entered with the people of Israel, He promised to bestow upon them a variety of blessings, so long as they continued obedient to Him as their Almighty Ruler; and in their subsequent history that people found every promise amply fulfilled, in the enjoyment of plenty, peace, a populous country, and victory over all enemies.”

“As “the book of the covenant” Exodus 20:22-33 concludes with promises and warnings Exodus 23:20-33, so does this collection of laws contained in the Book of Leviticus. But the former passage relates to the conquest of the land of promise, this one to the subsequent history of the nation. The longer similar passage in Deuteronomy Deut. 27–30 is marked by broader and deeper promises and denunciations having immediate reference not only to outward consequences, but to the spiritual death incurred by transgressing the divine will. Leviticus 26:4 Rain in due season - The periodical rains, on which the fertility of the holy land so much depends, are here spoken of. There are two wet seasons,…”

“26:3-39 These blessings and curses resemble a key element of ancient Near Eastern suzerain-vassal treaties. In such treaties, the suzerain king promised to defend the vassal king and his state, while the vassal took an oath of loyalty to his lord. Blessings and curses followed, with the curses generally being more lengthy (contrast 26:3-13 with 26:14-39; cp. Deut 27:15–28:68). Such treaties would call upon the gods as witnesses and enforcers. In God’s covenant with Israel, however, the Lord was one of the parties to the treaty (Israel being the other); since the Lord could swear by no one greater, he swore by himself (see Gen 22:16; Heb 6:13). 26:3 Treaties and covenants had conditions…”

“Lev 18:4, Lev 18:5; Deu 11:13-15, Deu 28:1-14; Jos 23:14, Jos 23:15; Jdg 2:1, Jdg 2:2; Psa 81:12-16; Isa 1:19, Isa 48:18, Isa 48:19; Mat 7:24, Mat 7:25; Rom 2:7-10; Rev 22:14 Leviticus 26:4”

“The Blessing of Fidelity to the Law. - Lev 26:3-5. If the Israelites walked in the commandments of the Lord (for the expression see Lev 18:3.), the Lord would give fruitfulness to their land, that they should have bread to the full. "I will give you rain-showers in season." The allusion here is to the showers which fall at the two rainy seasons, and upon which the fruitfulness of Palestine depends, viz., the early and latter rain ( Deu 11:14). The former of these occurs after the autumnal equinox, at the time of the winter-sowing of wheat and barley, in the latter half of October or beginning of November. It generally falls in heavy showers in November and December, and then after that only…”