He said to Moses, "Please, my master, please don't come down so hard on us for this foolish and thoughtless sin.
Please don't make her like a stillborn baby coming out of its mother's womb with half its body decomposed."
And Moses prayed to God: Please, God, heal her, please heal her.
God answered Moses, "If her father had spat in her face, wouldn't she be ostracized for seven days? Quarantine her outside the camp for seven days. Then she can be readmitted to the camp."
So Miriam was in quarantine outside the camp for seven days. The people didn't march on until she was readmitted.
Only then did the people march from Hazeroth and set up camp in the Wilderness of Paran.