16 and the sons of Israel have observed the sabbath; to keep the sabbath to their generations is a covenant age-during,
Exodus 31:16 Cross References - YLT
Genesis 9:13
13 My bow I have given in the cloud, and it hath been for a token of a covenant between Me and the earth;
Genesis 17:11
11 and ye have circumcised the flesh of your foreskin, and it hath become a token of a covenant between Me and you.
Jeremiah 50:5
5 To Zion they ask the way, Thitherward are their faces: Come in, and we are joined unto Jehovah, A covenant age-during—not forgotten.