Revelation 6:5-6

And when he had opened the third seal, I heard the third living creature saying: Come and see. And behold a black horse. And he that sat on him had a pair of scales in his hand.

And I heard, as it were a voice in the midst of the four living creatures, saying: Two pounds of wheat for a penny, and thrice two pounds of barley for a penny: and see thou hurt not the wine and the oil.