Sometimes the cloud remained only from evening until morning; when the cloud lifted in the morning, they set out. Or if it remained a day and a night, they moved out when the cloud lifted.
You did not abandon them in the wilderness because of Your great compassion. During the day the pillar of cloud never turned away from them, guiding them on their journey. And during the night the pillar of fire illuminated the way they should go.
Whether it was two days, a month, or longer, the Israelites camped and did not set out as long as the cloud stayed over the tabernacle. But when it was lifted, they set out.