6 And I heard a voice in the midst of the four living beings, saying, "A quart of wheat for a denarius, and three quarts of barley for a denarius; but do not harm the oil and the wine."
Revelation 6:6 Cross References - CAB
Psalms 76:10
10 For the inward thought of man shall give thanks to You, and the memorial of his inward thought shall keep a feast to You.
Revelation 4:6
6 and before the throne was something like a sea of glass, similar to crystal. And in the midst of the throne, and around the throne, were four living beings full of eyes in front and in back.
Revelation 7:3
3 saying, "Do not harm the earth, nor the sea, nor the trees, until we shall seal the servants of our God on their foreheads."
Revelation 9:4
4 They were told not to harm the grass of the earth, nor any plant, nor any tree, but only those men who do not have the seal of God on their foreheads.