en_tn/act/09/24.md

But their plan became known to Saul

This can be stated in active form. Alternate translation: "But someone told their plan to Saul" or "But Saul learned about their plan" (See: rc://en/ta/man/translate/figs-activepassive)

They watched the gates

This city had a wall surrounding it. People could normally only enter and exit the city through the gates.