King James Version (KJV) - Numbers 3:38 >

¶ But those that encamp before the tabernacle toward the east, [even] before the tabernacle of the congregation eastward, [shall be] Moses, and Aaron and his sons, keeping the charge of the sanctuary for the charge of the children of Israel; and the stranger that cometh nigh shall be put to death.

Berean Study Bible (BSB) - Numbers 3:38 >

Moses, Aaron, and Aaron’s sons were to camp to the east of the tabernacle, toward the sunrise, before the Tent of Meeting. They were to perform the duties of the sanctuary as a service on behalf of the Israelites; but any outsider who approached the sanctuary was to be put to death.