Exodus 12:16

12:16 On the first day there will be a holy convocation, and on the seventh day there will be a holy convocation for you. You must do no work of any kind on them, only what every person will eat – that alone may be prepared for you.

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.