God the covenant maker

"And God said, let there be light and there was light
and God saw that the light was good; and I separate God
the light of darkness
And God called the light day, and the darkness called
night, and there was evening and morning one day "

Source

From the beginning, God reveals himself as the author of covenants, Jeremias referred to that activity of God in creation (jeremias 33.20), speaking of the covenant with day and night, thus emphasizing the inalterable character of the divine nature and representing its relationship with the created as an immutable union under the sovereign government of God
The first covenant appears with Noah (Genesis 8.20)
Noah offers sacrifice to God, and we see the term covenant appear when God commits to never again destroy the creation by means of a flood.

Source

The first covenant appears with noe the concept of covenant can only be inferred in the Bible, the use of term covenant appears for the first time when the relationship of God with noah is related, the covenant is established through his sacrificial offering, after the flood , in gratitude for his release
Noe built an altar and offered blood sacrifices
There is no specific commandment requiring noe to offer blood sacrifices which clearly suggests that a source dating from abel had already been established to the lessons in the eden orchard, where a blood sacrifice was required to clothe Adam and to Eve, the sacrifice of noe liking God, and he responded by offering a covenant not to destroy the creation again through a flood

Isaac the result of the covenant
Isaac was born of Abraham and Sarah as a result of the promise of the covenant, the divine command to Abraham to sacrifice Isaac was the supreme test that would demonstrate both the reverence of Abraham and his trust in God's faithfulness to the covenant promise, prepared Isaac to be offered, with the certainty that God would raise him from death itself, God intervened in time and provided a lamb to be sacrificed in Isaac's place, this is a dramatic prefiguration of the offering that God would give through his only-born son to die in our place
The covenant of love of God gave Abraham a son and the love of the covenant provided a substitute sacrifice to save that hujo, centuries later the love of the covenant would make God surrender his own son as a sacrifice of blood for the sons of man

Source

As covenant God this is the greatest sacrifice that God made for humanity: to give his son to be crucified
¡God is faithful and is a covenant God!