'Asserting' in the Bible

For some time ago Theudas rose up, claiming to be somebody [of importance], and a group of about four hundred men allied themselves with him. But he was killed, and all who followed him were scattered and came to nothing.

and Jason has welcomed them [into his house and protected them]! And they all are saying things contrary to the decrees of Caesar, [actually] claiming that there is another king, Jesus.”

instead they had some points of disagreement with him about their own religion and about one Jesus, a man who had died, but whom Paul kept asserting and insisting [over and over] to be alive.

But I have had help from God to this day, and I stand [before people] testifying to small and great alike, stating nothing except what the Prophets and Moses said would come to pass—