God’s covenant between you and Jesus is eternal. It’s based on the finished work of Christ.

“May the LORD be between you and me, and between your descendants and my descendants, forever.” (1Sam 20:42)
“Now may the God of peace who brought up our Lord Jesus from the dead, that great Shepherd of the sheep, through the blood of the everlasting covenant” (Heb 13:20)
“For this is My blood of the new covenant, which is shed for many for the remission of sins.” (Matt 26:28)
“by so much more Jesus has become a surety of a better covenant.” (Heb 7:22)
“And I will make an everlasting covenant with them, that I will not turn away from doing them good; but I will put My fear in their hearts so that they will not depart from Me.” (Jer 32:40)
“And it came to pass, when the sun went down and it was dark, that behold, there appeared a smoking oven and a burning torch that passed between those pieces. On the same day the LORD made a covenant with Abram” (Gen 15:17,18)
“Sarah your wife shall bear you a son, and you shall call his name Isaac; I will establish My covenant with him for an everlasting covenant, and with his descendants after him.” (Gen 17:19)
“Now therefore, if you will indeed obey My voice and keep My covenant, then you shall be a special treasure to Me above all people; for all the earth is Mine.” (Ex 19:5)
“Then the king stood in his place and made a covenant before the LORD, to follow the LORD, and to keep His commandments and His testimonies and His statutes with all his heart and all his soul, to perform the words of the covenant that were written in this book.” (2Chr 34:31)
“I pray, LORD God of heaven, O great and awesome God, You who keep Your covenant and mercy with those who love You and observe Your commandments” (Neh 1:5)
“I, the LORD, have called You in righteousness, and will hold Your hand; I will keep You and give You as a covenant to the people, as a light to the Gentiles” (Isa 42:6)
“Nevertheless I will remember My covenant with you in the days of your youth, and I will establish an everlasting covenant with you.” (Ezek 16:60)
Reading: 1Sam 19-21; Lk 3