1 Peter 5:8

Trust in God is not all that we need, however. We also need to practice self-control and to keep alert (cf. 1 Peter 1:13; 1 Peter 4:7) because Satan is on the prowl (cf. Job 1:7; Matthew 26:41; 1 Corinthians 16:13). Peter’s readers were in danger from him if they gave in to his temptation to regard their sufferings as an indication of God’s disinterest or ill will (cf. James 1:13). Satan not only seeks to deceive us as a serpent (2 Corinthians 11:3), but he also seeks to devour us as a lion.

"The picture is one of a beast swallowing its prey in a gulp." [Note: Davids, p. 191.]