Tobit 12:12 and 12:14-16
Tobit is not sacred Scripture. Besides, even IF it was, this passage doesn't ever say believers should pray to angels. Tobit didn't know Raphael was an angel when he went with Tobit's son Tobias. And, this supposed "angel of the Lord" told Tobit something that went against actual Scripture when he said, "For almsgiving delivers from death, and it will purge away every sin.". No doubt, that's where Roman Catholics got the idea of charging indulgences for getting loved ones out of Purgatory - it's pretty shaky ground to build whole doctrines out of such.