New Living Translation
Tell him to stop worrying. Tell him he doesn’t need to fear the fierce anger of those two burned-out embers, King Rezin of Syria and Pekah son of Remaliah.

American Standard Version
and say unto him, Take heed, and be quiet; fear not, neither let thy heart be faint, because of these two tails of smoking firebrands, for the fierce anger of Rezin and Syria, and of the son of Remaliah.

Berean Study Bible
and say to him: Calm down and be quiet. Do not be afraid or disheartened over these two smoldering stubs of firewood—over the fierce anger of Rezin and Aram and of the son of Remaliah.

Douay-Rheims Bible
And thou shalt say to him: See thou be quiet: fear not, and let not thy heart be afraid of the two tails of these fire brands, smoking with the wrath of the fury of Rasin king of Syria, end of the son of Romelia.

English Revised Version
and say unto him, Take heed, and be quiet; fear not, neither let thine heart be faint, because of these two tails of smoking firebrands, for the fierce anger of Rezin and Syria, and of the son of Remaliah.

King James Bible
And say unto him, Take heed, and be quiet; fear not, neither be fainthearted for the two tails of these smoking firebrands, for the fierce anger of Rezin with Syria, and of the son of Remaliah.

World English Bible
Tell him, 'Be careful, and keep calm. Don't be afraid, neither let your heart be faint because of these two tails of smoking torches, for the fierce anger of Rezin and Syria, and of the son of Remaliah.

Young's Literal Translation
and thou hast said unto him: 'Take heed, and be quiet, fear not, And let not thy heart be timid, Because of these two tails of smoking brands, For the fierceness of the anger of Rezin and Aram, And the son of Remaliah.

Isaiah 7:4 Additional Translations ...