Is God's Love Not Mentioned in Revelation?

John of Patmos is traditionally thought to have been the author of the gospel of John. The other writings allegedly by John, the gospel John, first John, God is love. And Christ's command to his followers is to love one anotherLove is a dominant word in the gospel of john and in first John. But Revelation doesn't say that it's an act of love. What it says is that he's giving it to his slaves. They're called slaves. Those who are enslaved to God are rewarded, but not out of love.