In this section God explained that His discipline for disobedience would be to produce repentance and return to Himself by the Israelites.
26:34-39 The length of the Babylonian captivity was 70 years because the Israelites failed to observe 70 sabbatical years in the land (2 Chron. 36:21; cf. Jer. 29:10).
26:40-46 Confession springing from humility would restrain God's hand of discipline on Israel (vv. 40-41). Apostasy and consequent judgment would not invalidate God's promises to Abraham (vv. 42-45). Discipline would be a stage in God's dealings with Abraham's seed, but He would not reject His people or cut them off as a nation. These verses are a strong witness to the unconditional nature of the Abrahamic Covenant.
"When Israel was in Egypt and was humbled under the hand of Pharaoh, God remembered his covenant with Abraham and delivered them (Ex 2:24). Similarly, in the future when Israel would humble themselves, God would remember his covenant and deliver his people."302
Verse 46 concludes all the legislation of the Mosaic Covenant that began in Exodus 25, though more specifically it summarizes the material in Leviticus. What follows in chapter 27 is supplementary.