Say to him, 'Be careful, keep calm and don't be afraid. Do not lose heart because of these two smoldering stubs of firewood – because of the fierce anger of Rezin and Aram and of the son of Remaliah.
NIV
And say to him, Take heed and be quiet; fear not, neither be fainthearted because of these two stumps of smoking firebrands--at the fierce anger of [the Syrian King] Rezin and Syria and of the son of Remaliah [Pekah, usurper of the throne of Israel].
AMP
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.
KJV
When the people saw the thunder and lightning and heard the trumpet and saw the mountain in smoke, they trembled with fear. They stayed at a distance
NIV
Now all the people perceived the thunderings and the lightnings and the noise of the trumpet and the smoking mountain, and as [they] looked they trembled with fear and fell back and stood afar off.
AMP
And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw it, they removed, and stood afar off.
KJV