Acts 4:18

18. The resolution was no sooner formed than acted upon. (18) " And they called them, and commanded them not to speak at all, nor teach in the name of Jesus. " How Luke learned the particulars of the secret consultation which resulted in this injunction, we are not informed, though it is not difficult to imagine. Gamaliel, Saul's teacher, and perhaps Saul himself, was present as a member of the Sanhedrim; and a great company of the priests themselves afterward became obedient to the faith. These and other conversions from the ranks of the enemy opened up channels for such information in abundance.