Exodus 13:10

13:10 So you must keep ¹  this ordinance at its appointed time from year to year. ² 

Exodus 30:19

30:19 and Aaron and his sons must wash their hands and their feet from it. ³ 

Exodus 37:5

37:5 and put the poles into the rings on the sides of the ark in order to carry the ark.

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¹ tn The form is a perfect tense with the vav (ו) consecutive, functioning as the equivalent of an imperfect of instruction or injunction.

² tn Or “every year,” or “year after year.”

³ tn That is, from water from it.