Albert Barnes Commentary Acts 24:18

"amidst which they found me purified in the temple, with no crowd, nor yet with tumult: but [there were] certain Jews from Asia--" — Acts 24:18 (ASV)

Certain Jews from Asia (Acts 21:27).

Found me purified in the temple (Acts 21:26–27). They found me engaged in the sacred service of completing the observance of my vow.

Neither with multitude. Not having introduced a multitude with me—in a quiet and peaceful manner.