Exodus 26:34

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

Exodus 25:21

And thou shalt put the mercy-seat 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 mercy-seat above upon the ark:

Hebrews 9:5

and above it cherubim of glory overshadowing the mercy-seat; of which things we cannot now speak severally.

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 mercy-seat 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 mercy-seat above upon the ark:
Hebrews 9:5
and above it cherubim of glory overshadowing the mercy-seat; of which things we cannot now speak severally.

General references

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

American Standard Version Public Domain