Exodus 28:4, 28
These are the garments that they shall make: a breastpiece, an ephod, a robe, a woven tunic, a turban, and a sash. They are to make these holy garments for your brother Aaron and his sons, so that they may serve Me as priests. . . .

Exodus 39:22
They made the robe of the ephod entirely of blue cloth, the work of a weaver,

Leviticus 8:7
He put the tunic on Aaron, tied the sash around him, clothed him with the robe, and put the ephod on him. He tied the woven band of the ephod around him and fastened it to him.