Exodus 36:10

And every wise hearted man among them that wrought the work of the tabernacle made ten curtains [of] fine twined linen, and blue, and purple, and scarlet: [with] cherubims of cunning work made he them.

The length of one curtain [was] twenty and eight cubits, and the breadth of one curtain four cubits: the curtains [were] all of one size.

And he made loops of blue on the edge of one curtain from the selvedge in the coupling: likewise he made in the uttermost side of [another] curtain, in the coupling of the second.

Fifty loops made he in one curtain, and fifty loops made he in the edge of the curtain which [was] in the coupling of the second: the loops held one [curtain] to another.