Deuteronomy 7:21 in the King James Version
Thou shalt not be affrighted at them: for the LORD thy God is among you, a mighty God and terrible.
Context
20 Moreover the LORD your God will send the hornet among them, until those who are left, and hide themselves, perish from before you.
21 You shall not be scared of them; for the LORD your God is among you, a great and awesome God.
22 The LORD your God will cast out those nations before you little by little. You may not consume them at once, lest the animals of the field increase on you.