Exodus 28:6
And they shall make the ephod of gold, of blue, and of purple, of scarlet, and fine twined linen, with cunning work.
Cross-reference
Exodus 28:4 lists the ephod among the holy garments; verse 6 then provides its detailed construction instructions.
Exodus 28:15 describes the breastpiece made of the same gold, blue, purple, scarlet yarn, and fine linen, closely connected to the ephod.
Exodus 26:1 describes the tabernacle curtains made of the same fine linen and colored yarns, showing the ephod's materials match the sanctuary.
Exodus 35:6 lists the same colored yarns and fine linen as materials for the tabernacle, paralleling the ephod's materials.
Exodus 39:2 records the actual making of the ephod exactly as commanded, fulfilling the instructions given here.
Leviticus 8:7 describes Aaron being clothed with the ephod, enacting the command from Exodus.
1 Samuel 2:28 recalls God choosing priests to wear an ephod, referencing the original command from Exodus.