John the Apostle
Revelation 6:6BSB·traditional attribution

And I heard what sounded like a voice from among the four living creatures, saying, “A quart of wheat for a denarius, and three quarts of barley for a denarius, and do not harm the oil and wine.”

Matthew Henry Presbyterian @wholebiblehenry

The next three seals give us a sad prospect of great and desolating judgments with which God punishes those who either refuse or abuse the everlasting gospel. Though some understand them of the persecutions that befell the church of Christ, and others of the destruction of the Jews, they rather seem more generally to represent God's terrible judgments, by which he avenges the quarrel of...

Commenting on Revelation 6:3-8

John Gill Reformed Baptist @doctorgill

And I heard a voice in the midst of the four beasts say,.... Not the voice of Agabus to the Apostle Paul, Act 11:28; but rather of Christ, who was in the midst of them, Rev 5:6; the Ethiopic version adds, "as the voice of an eagle": a measure of wheat for a penny, and three measures of barley for a penny; "Choenix", the measure...

Albert Barnes Presbyterian @notesbybarnes

Verse 6. (1) "measure" "The word chaeniv signifieth a measure containing one wine quart, and the twelfth part of a quart. (a) "hurt not"