Exodus 26:5

26:5 You are to make fifty loops on the one curtain, and you are to make fifty loops on the end curtain which is on the second set, so that the loops are opposite one to another. ¹ 

Exodus 26:10

26:10 You are to make fifty loops along the edge of the end curtain in one set and fifty loops along the edge of the curtain that joins the second set.

¹ tn Heb “a woman to her sister.”