'Piously' in the Bible

Ye are witnesses, and God, how piously and righteously and blamelessly we have conducted ourselves with you that believe:

and all also who will to live piously in Christ Jesus shall be persecuted,

teaching us, that denying the impiety and the worldly desires, soberly and righteously and piously we may live in the present age,

If anyone thinks himself to be religious [scrupulously observant of the rituals of his faith], and does not control his tongue but deludes his own heart, this person’s religion is worthless (futile, barren).