The answer is divided into two parts;
(a) Jeremiah 32:26-35, the sins of Judah are shown to be the cause of her punishment:
(b) Jeremiah 32:36-44, this punishment was not for Judah‘s destruction, but for her amendment.
I will give - Or, I am giving.
From their youth - God‘s mighty deeds for Israel began in Egypt Jeremiah 32:20, and so did Israel‘s sin.
Jeremiah 32:34, Jeremiah 32:35
These verses are repeated from Jeremiah 7:30-31, but with two important variations. Baal is put for Tophet, and to Molech instead of in the fire. Molech the king and Baal the lord are different names of the sun-god, but in altered relations. Molech is the sun as the mighty fire, which in passing through the signs of the Zodiac burns up its own children. It is an old Canaanite worship, carried by the Phoenicians to all their colonies, and firmly established in Palestine at the time when the Israelites conquered the country.
God‘s new covenant Jeremiah 31:31 is on God‘s side, I will not turn away from them to do them good, i. e., I will never cease from doing them good. On their side, I will put My fear in their hearts that they depart not from Me. In these two conditions consists the certainty of the eternal duration of the covenant Matthew 28:20.
Assuredly - literally, in truth, i. e., in verity, in reality. It refers to God‘s firm purpose, rather than to the safety and security of the people. The new covenant is one of grace, indicated by God‘s rejoicing over His people, and “planting them with His whole heart.”
Fields - literally, The field, the open unenclosed country Jeremiah 4:17. In Jeremiah 32:44 fields refers to the several portions of it which belonged to individuals, and of which the boundaries were shown by landmarks.
Subscribe evidences - See Jeremiah 32:10. In order to bring the certainty of the return from exile more vividly before the mind, the prophet enumerates the several subdivisions of the territory of the kings of Judah.