Exodus 38:23

And with him was Aholiab, son of Ahisamach, of the tribe of Dan, an engraver, and a cunning workman, and an embroiderer in blue, and in purple, and in scarlet, and fine linen.

Cross-reference

Exodus 26:31 describes the veil's materials (blue, purple, scarlet, fine linen) which Oholiab is skilled to embroider.

Exodus 35:34 notes God gave Oholiab ability to teach; here his specific skills as craftsman are listed.