Exodus 26:4-6

Amplified Bible

⁴ You shall make loops of blue on the outer edge of the last curtain in the first set, and likewise in the second set. ⁵ You shall make fifty loops on the one curtain, and fifty loops on the edge of the last curtain that is in the second set. The loops on one curtain correspond to the loops on the other. ⁶ You shall make fifty gold hooks, and fasten the curtains together with the hooks; and the tabernacle shall be one unit.