Albert Barnes on Acts 9:40

But Peter put them all forth. From the room. See a similar case in Mt 9:25. Why this was done is not said. Perhaps because he did not wish to appear as if seeking publicity. If done in the presence of many persons, it might seem like ostentation. Others suppose it was that he might offer more fervent and agonizing prayer to God than he would be willing they should witness. Compare 2Kgs 4:23.

Tabitha, arise. Compare Mk 5:41,42.

(b) "put them all forth" Mt 9:25 (c) "Tabitha, arise" Mk 5:41,42, Jn 11:43