'Religious' in the Bible

“Again, you have heard that it was said to the men of old, ‘You shall not make false vows, but you shall fulfill your vows to the Lord [as a religious duty].’

Then the disciples of John [the Baptist] came to Jesus, asking, “Why do we and the Pharisees often fast [as a religious exercise], but Your disciples do not fast?”

So Paul, standing in the center of the Areopagus, said: “Men of Athens, I observe [with every turn I make throughout the city] that you are very religious and devout in all respects.

Even some of the Asiarchs (officials) who were his friends sent word to him and repeatedly warned him not to venture into the amphitheater.

I do not allow a woman to teach or exercise authority over a man, but to remain quiet [in the congregation].

But if a widow has children or grandchildren [who are adults], see to it that these first learn to show great respect to their own family [as their religious duty and natural obligation], and to compensate their parents or grandparents [for their upbringing]; for this is acceptable and pleasing in the sight of God.

Indeed, all who delight in pursuing righteousness and are determined to live godly lives in Christ Jesus will be hunted and persecuted [because of their faith].

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).

Pure and unblemished religion [as it is expressed in outward acts] in the sight of our God and Father is this: to visit and look after the fatherless and the widows in their distress, and to keep oneself uncontaminated by the [secular] world.