New Revised Standard Version
Isaiah said to them, “Say to your master, ‘Thus says the LORD: Do not be afraid because of the words that you have heard, with which the servants of the king of Assyria have reviled me.

Contemporary English Version
he told them that the LORD had this message for Hezekiah: I am the LORD. Don't worry about the insulting things that have been said about me by these messengers from the king of Assyria.

New American Bible
he said to them, “Tell this to your lord: Thus says the LORD: Do not be frightened by the words you have heard, by which the deputies of the king of Assyria have blasphemed me.

Douay-Rheims Bible
And Isaias said to them: Thus shall you say to your master: Thus saith the Lord: Be not afraid for the words which thou hast heard, with which the servants of the king of the Assyrians have blasphemed me.

And Isaias said to them: Thus shall you say to your master: Thus saith the Lord: Be not afraid for the words which thou hast heard, with which the servants of the king of the Assyrians have blasphemed me.

Isaiah.

Isaiah 37:6,7-38 And Isaiah said to them: Thus shall you say to your master: Thus saith the Lord: Be not afraid of the words that thou hast heard, with which the servants of the king of the Assyrians have blasphemed me. . . .

Be not afraid.

2 Kings 6:16 But he answered: Fear not: for there are more with us than with them.

Exodus 14:13 And Moses said to the people: Fear not: stand, and see the great wonders of the Lord, which he will do this day; for the Egyptians, whom you see now, you shall see no more for ever.

Leviticus 26:8 Five of yours shall pursue a hundred others: and a hundred of you ten thousand. Your enemies shall fall before you by the sword.

Deuteronomy 20:1,3,4 If thou go out to war against thy enemies, and see horsemen and chariots, and the numbers of the enemy's army greater than thine, thou shalt not fear them: because the Lord thy God is with thee, who brought thee out of the land of Egypt. . . .

Joshua 11:6 And the Lord said to Joshua: Fear them not: for to morrow at this same hour I will deliver all these to be slain in the sight of Israel: thou shalt hamstring their horses, and thou shalt burn their chariots with fire.

2 Chronicles 20:15,17 And he said: Attend ye, all Juda, and you that dwell in Jerusalem, and thou king Josaphat: Thus saith the Lord to you: Fear ye not, and be not dismayed at this multitude: for the battle is not yours, but God's. . . .

Isaiah 41:10-14 Fear not, for I am with thee: turn not aside, for I am thy God: I have strengthened thee, and have helped thee, and the right hand of my just one hath upheld thee. . . .

Isaiah 51:7,12,13 Hearken to me, you that know what is just, my people who have my law in your heart: fear ye not the reproach of men, and be not afraid of their blasphemies. . . .

the servants.

2 Kings 18:17,35 And the king of the Assyrians sent Tharthan, and Rabsaris, and Rabsaces, from Lachis, to king Ezechias, with a strong army, to Jerusalem: and they went up and came to Jerusalem, and they stood by the conduit of the upper pool, which is in the way of the fuller's field. . . .

Psalm 74:18,23 Remember this, the enemy hath reproached the Lord: and a foolish people hath provoked thy name. . . .

Revelation 13:6 And he opened his mouth unto blasphemies against God, to blaspheme his name and his tabernacle and them that dwell in heaven.