Albert Barnes Commentary Numbers 16:27

"So they gat them up from the tabernacle of Korah, Dathan, and Abiram, on every side: and Dathan and Abiram came out, and stood at the door of their tents, and their wives, and their sons, and their little ones." — Numbers 16:27 (ASV)

Stood in the door of their tents - Apparently in wilful defiance.