Isaiah 7:4

7:4 Tell him, ‘Make sure you stay calm! Don’t be afraid! Don’t be intimidated by these two stubs of smoking logs, or by the raging anger of Rezin, Syria, and the son of Remaliah.

Isaiah 10:24

10:24 So here is what the sovereign master, the Lord who commands armies, says: “My people who live in Zion, do not be afraid of Assyria, even though they beat you with a club and lift their cudgel against you as Egypt did.

Isaiah 37:6

37:6 Isaiah said to them, “Tell your master this: ‘This is what the Lord says: “Don’t be afraid because of the things you have heard – these insults the king of Assyria’s servants have hurled against me.