Charles Ellicott Commentary Numbers 12:4

"And Jehovah spake suddenly unto Moses, and unto Aaron, and unto Miriam, Come out ye three unto the tent of meeting. And they three came out." — Numbers 12:4 (ASV)

Come out you three... — There is nothing in these words which implies that Miriam entered into the Tabernacle itself. Moses, Aaron, and Miriam were summoned to go out of the camp , and to come to the entrance of the Tabernacle, or rather of the court, since the command to come as far as the entrance into the Sanctuary appears to have been given afterwards (Numbers 12:5). It must be remembered that there was only one court at this time.