'Strenuously' in the Bible

"You are mad," they said. But she strenuously maintained that it was true. "It is his guardian angel," they said.

to Mary who has laboured strenuously among you;

Greetings to those Christian workers, Tryphaena and Tryphosa; also to dear Persis, who has laboured strenuously in the Lord's work.

But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.

This is a faithful saying, and on these various points I would have you insist strenuously, in order that those who have their faith fixed on God may be careful to set an example of good actions. For these are not only good in themselves, but are also useful to mankind.