New Defender's Study Bible Notes
91:13 lion and adder. In using this passage, perhaps Satan recognized it as a reference to the accomplishment by Christ of the primeval promise of Genesis 3:15, that the Seed of the Woman would eventually crush the Serpent’s head.
91:13 dragon. Both the lion and the dragon are symbolic of Satan (I Peter 5:8; Revelation 12:9). Here, incidentally, is further proof that dragons were animals as real as adders and lions. It appears that dragons were animals similar to dinosaurs (see notes on Job 40:15-19).