What was Abraham's part of the covenant?

Answer 1

• 1) In Genesis ch.15, the Covenant Between the Parts:
  

a) God informs Abraham of future events (the Egyptian exile)
b) God promises the land of Canaan (Israel) to Abraham's descendants
c) The covenant is finalized through a demonstration of God's presence (see Genesis 15:7-9 and 15:17).

Link: More about Abraham

• 2) In Genesis ch.17, the covenant of circumcision:
  

a) The promises of many descendants (17:2,3) and of inheriting the land of Canaan are repeated (17:8), but the main thing in this covenant is the promise that God will be the God of Abraham (17:7, 17:8).
b) God promises that Abraham and Sarah will have a son (17:15-16), whom they will name Isaac (17:19) and who will be the continuation of God's covenant with Abraham (17:21).
c) The covenant itself is manifested through circumcision, for Abraham and his descendants (17:10).

Answer 2

Circumcision (Genesis 17).