Exodus 31:16

The Israelites must observe the Sabbath and celebrate the Sabbath throughout their generations as a long lasting covenant.

Genesis 9:13

I give you my rainbow in the clouds. It will be the sign of my covenant with the world of mankind.

Genesis 17:11

You are to undergo circumcision. It will be the sign of the covenant between us.

Jeremiah 50:5

They will ask for the way to Zion turning their faces in its direction. They will come to join themselves to Jehovah in an everlasting covenant that will not be forgotten.

Treasury of Scripture Knowledge

Summary

Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.

General references

Bible References

A perpetual covenant

Genesis 9:13
I give you my rainbow in the clouds. It will be the sign of my covenant with the world of mankind.
Genesis 17:11
You are to undergo circumcision. It will be the sign of the covenant between us.
Jeremiah 50:5
They will ask for the way to Zion turning their faces in its direction. They will come to join themselves to Jehovah in an everlasting covenant that will not be forgotten.

General references

Ezekiel 20:20
Sanctify my Sabbaths. They shall be a sign between you, and me that you may know that I am Jehovah your God.'