Expositor's Bible Commentary Commentary Revelation 13:6

"And he opened his mouth for blasphemies against God, to blaspheme his name, and his tabernacle, [even] them that dwell in the heaven." — Revelation 13:6 (ASV)

(See comments on v.1.) The period of the beast’s authority is given as “forty-two months,” the same period already referred to in 11:2–3; 12:6, 13 .