A.T. Robertson Commentary Revelation 17:13

"These have one mind, and they give their power and authority unto the beast." — Revelation 17:13 (ASV)

Have one mind (μιαν γνωμην εχουσιν). "One purpose" (γνωμη from γινωσκω) as in Ac 20:3; 1 Corinthians 1:10. The new powers are allies of the beast.

They give their power and authority unto the beast (την δυναμιν κα την εξουσιαν αυτων τω θηριω διδοασιν). Present active indicative of διδωμ. Just as the dragon gave both power and authority to the beast (13:2), so they are wholly at the service of the beast.