Jesus’ authority to tread on serpents and scorpions closely recalls Psalm 91’s promise of treading lion and serpent. Luke 4 already quoted Psalm 91 in the temptation, giving this Psalm unusual internal resonance in Luke.

Satan’s fall and authority over serpent imagery can be read within the Bible-wide serpent-defeat theme beginning in Genesis 3:15, but Luke does not quote the verse here. A careful reading should keep this as canonical horizon rather than direct fulfillment.

Jesus’ command to rejoice that names are written in heaven belongs to the Old Testament’s heavenly-book or book-of-life tradition. Exodus 32 presents Moses speaking of God’s book in a judgment context, while later texts such as Psalm 69 and Daniel 12 develop the imagery of divine inscription, belonging, judgment, and deliverance.