Acts 23:16

And when Paul's sister's son heard of their lying in wait, he went and entered into the castle, and told Paul.

And when Paul's sister's son (see the note at )

Heard of their lying in wait, he went and entered into the castle, and told Paul. If this lad was then residing at Jerusalem for his education, like Paul himself, he may have gotten at the schools those hints of the conspiracy on which he so promptly acted.