Revelation 8:3

And another angel came and stood by the altar, having a golden censer, and there was given him much incense to present with the prayers of all the saints on the golden altar before the throne.

1 Corinthians 10:21

You cannot drink the Lord's cup and the cup of demons; you cannot partake at the Lord's table and the table of demons.

Revelation 3:20

Behold, I stand at the door and knock; if any one shall hear my voice and open the door, I will enter in to him, and feast with him, and he with me.

Treasury of Scripture Knowledge

Summary

The altar of wood was three cubits high, and the length thereof two cubits; and the corners thereof, and the length thereof, and the walls thereof, were of wood: and he said unto me, This is the table that is before the LORD.

Bible References

Altar

Revelation 8:3
And another angel came and stood by the altar, having a golden censer, and there was given him much incense to present with the prayers of all the saints on the golden altar before the throne.

This is

1 Corinthians 10:21
You cannot drink the Lord's cup and the cup of demons; you cannot partake at the Lord's table and the table of demons.
Revelation 3:20
Behold, I stand at the door and knock; if any one shall hear my voice and open the door, I will enter in to him, and feast with him, and he with me.