Exodus 28:31
'And thou hast made the upper robe of the ephod completely of blue,
Exodus 28:4
And these are the garments which they make: a breastplate, and an ephod, and an upper robe, and an embroidered coat, a mitre, and a girdle; yea, they have made holy garments for Aaron thy brother, and for his sons, for his being priest to Me.
Exodus 28:28
and they bind the breastplate by its rings unto the rings of the ephod with a ribbon of blue, to be above the girdle of the ephod, and the breastplate is not loosed from the ephod.
Exodus 39:22-26
And he maketh the upper robe of the ephod, work of a weaver, completely of blue;
Leviticus 8:7
and doth put on him the coat, and doth gird him with the girdle, and doth clothe him with the upper robe, and doth put on him the ephod, and doth gird him with the girdle of the ephod, and doth bind it to him with it,