ESV Reformation Study Bible – Gen 17:7
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Gen 17:7

17:7 your offspring. The descendants of Abraham through the child of promise, Isaac (Rom. 4:19; 9:6–9). Gentile believers participate in this covenant promise through spiritual incorporation into Israel (Eph. 2:11–13; 1 Pet. 2:10 note) by union with Christ, the great offspring of Abraham (Gal. 3:16, 26–29).

everlasting. The unilateral and gracious nature of God’s covenant with Abraham is underscored by its eternal character (v. 2 note). God’s covenant endures forever because He does not change and Jesus Christ fulfills every condition (2 Cor. 1:20; Eph. 2:12, 13).

to be God to you. Although there is a legal dimension to the covenant (v. 2 note), God’s covenant relationship with His people is first and foremost one of divine-human communion and fellowship (Ex. 6:7; Deut. 29:13). God graciously dwells with His people, and they gratefully respond in faith, love, and obedience.