Bilangan 4:11

4:11 “They must spread a blue cloth on the gold altar, and cover it with a covering of fine leather; and they must insert its poles.

Bilangan 4:5

4:5 When it is time for the camp to journey, ¹  Aaron and his sons must come and take down the screening curtain and cover the ark of the testimony with it.

[4:5]  ¹ tn The Hebrew text uses the infinitive construct in an adverbial clause of time; literally it says “in the journeying of the camp.” The genitive in such constructions is usually the subject. Here the implication is that people would be preparing to transport the camp and its equipment.