en_tn/act/12/05.md

So Peter was kept in the prison

So Peter was kept in the prison - Implying that the soldiers were continually guarding Peter in prison.

earnestly

"continuously with dedication" or "with commitment without stopping"

by the assembly

The Jerusalem believers were praying or the church in Jerusalem was praying.

for him

"for Peter"

Herod was going to bring him out

"Herod was going to bring Peter out from prison to execute him"

bound with two chains

"tied with two chains" or "fastened with two chains"

watching over

"guarding"