But lest it spread further among the people, let us threaten them not to speak anymore in this name to any man.
Other versions
King James Version
But that it spread no further among the people, let us straitly threaten them, that they speak henceforth to no man in this name.English Standard Version
But in order that it may spread no further among the people, let us warn them to speak no more to anyone in this name."New International Version
But to stop this thing from spreading any further among the people, we must warn these men to speak no longer to anyone in this name."