Exodus 36:11-13

New King James Version

¹¹ He made loops of blue yarn on the edge of the curtain on the selvedge of one set; likewise he did on the outer edge of the other curtain of the second set. ^12 (A)Fifty loops he made on one curtain, and fifty loops he made on the edge of the curtain on the end of the second set; the loops held one curtain to another. ¹³ And he made fifty clasps of gold, and coupled the curtains to one another with the clasps, that it might be one tabernacle.