They were persuaded. They called the apostles in, had them flogged, ordered them not to speak in the name of Jesus, and let them go.
In context
38So in the present case I tell you: keep away from these men and let them alone. If this plan or this work is of human origin, it will collapse. 39But if it is from God, you will not be able to destroy them — and you may find that you are fighting against God.” 40They were persuaded. They called the apostles in, had them flogged, ordered them not to speak in the name of Jesus, and let them go. 41So they left the Sanhedrin rejoicing that they had been counted worthy to suffer dishonor for the Name. 42And every day, in the temple and from house to house, they never stopped teaching and proclaiming the good news that Jesus is the Christ.