Exodus 12:25

12:25 When you enter the land that the Lord will give to you, just as he said, you must observe ¹  this ceremony.

Exodus 40:35

40:35 Moses was not able to enter the tent of meeting because the cloud settled on it and the glory of the Lord filled the tabernacle.

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¹ tn The verb used here and at the beginning of v. 24 is שָׁמַר (shamar); it can be translated “watch, keep, protect,” but in this context the point is to “observe” the religious customs and practices set forth in these instructions.