The throne and the Lamb are paired together in 4 places in Revelation.
And between the throne and the four living creatures and among the elders I saw a Lamb standing, as though it had been slain, with seven horns and with seven eyes, which are the seven spirits of God sent out into all the earth.
Revelation 5:13 And I heard every creature in heaven and on earth and under the earth and in the sea, and all that is in them, saying, “To him who sits on the throne and to the Lamb be blessing and honor and glory and might forever and ever!”
Revelation 6:16 calling to the mountains and rocks, “Fall on us and hide us from the face of him who is seated on the throne, and from the wrath of the Lamb,
Revelation 7:9 After this I looked, and behold, a great multitude that no one could number, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands, 10and crying out with a loud voice, “Salvation belongs to our God who sits on the throne, and to the Lamb!” 11And all the angels were standing around the throne and around the elders and the four living creatures, and they fell on their faces before the throne and worshiped God
In the last passage, John made it clear that God is sitting on the throne and the Lamb is paired to Him as one and the same God that is being worshiped.
As pointed out by Dottard's comments, there are actually 3 more passages that the throne and the Lamb are paired. The total number of passages is 7.
Revelation 14:3 And they sang a new song before the throne and before the four living creatures and the elders. No one could learn the song except the 144,000 who had been redeemed from the earth. 4These are those who did not defile themselves with women, for they remained virgins. They follow the Lamb wherever he goes. They were purchased from among mankind and offered as firstfruits to God and the Lamb.
Then the angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb
No longer will there be any curse. The throne of God and of the Lamb will be in the city, and his servants will serve him. 4 They will see his face, and his name will be on their foreheads.
Again, Dottard insightfully saw that in the last passage, the singular "his" is used for God's/Lamb's servants, face, and name.
To me, this is quite solid in proving that God and the Lamb are one and the same in the context of Revelation.