Exodus 26:9

26:9 You are to join five curtains by themselves and six curtains by themselves. You are to double over the sixth curtain at the front of the tent.

Exodus 26:24

26:24 At the two corners they must be doubled at the lower end and finished together at the top in one ring. So it will be for both.

Exodus 36:29

36:29 At the two corners they were doubled at the lower end and finished together at the top in one ring. So he did for both.