When all the people saw the pillar of cloud standing at the entrance to the tent, they would stand up and worship, each one at the entrance to his own tent.
KJV
And all the people saw the cloudy pillar stand [at] the tabernacle door: and all the people rose up and worshipped, every man [in] his tent door.
ASV
And all the people saw the pillar of cloud stand at the door of the Tent: and all the people rose up and worshipped, every man at his tent door.