It is best to assume that Satan knew that Jesus is the Son of God. Possible meanings are 1) this is a temptation to do a miracle for Jesus's own benefit. Alternate translation: "Since you are truly the Son of God, you can throw yourself down" or 2) this is a challenge or accusation. Alternate translation: "Prove that you are truly the Son of God by throwing yourself down"
This can be stated in active form. Alternate translation: "for the writer wrote in the scriptures" or "for it says in the scriptures" (See: [[rc://en/ta/man/translate/figs-activepassive]])
This can be translated with a direct quotation, and you can specify that it is God who will command. Alternate translation: "'God will say to his angels, "Take care of him,"' and" or "'God will command his angels to take care of you,' and" (See: [[rc://en/ta/man/translate/figs-quotations]])