Exodus 26:34

And thou shalt put the seat of reconciliation upon the ark of the testimony in the holy of holies.

Exodus 25:21

And thou shalt put the seat of reconciliation above upon the ark, and in the ark thou shalt put the testimony that I shall give thee.

Exodus 40:20

And he took and put the testimony into the ark and set the staves on the ark and put the seat of reconciliation upon the ark above,

Hebrews 9:5

and over it the cherubim of glory shadowing the seat of reconciliation, of which we cannot now speak particularly.

Treasury of Scripture Knowledge

Summary

And thou shalt put the mercy seat upon the ark of the testimony in the most holy place.

General references

Bible References

Put the mercy seat

Exodus 25:21
And thou shalt put the seat of reconciliation above upon the ark, and in the ark thou shalt put the testimony that I shall give thee.
Exodus 40:20
And he took and put the testimony into the ark and set the staves on the ark and put the seat of reconciliation upon the ark above,
Hebrews 9:5
and over it the cherubim of glory shadowing the seat of reconciliation, of which we cannot now speak particularly.

General references

Exodus 40:3
And thou shalt put therein the ark of the testimony and cover the ark with the veil.
Mark 15:38
Then the veil of the temple was rent in two from the top to the bottom.