'Religion' in the Bible
I hate the thoughts of undecided [in religion], double-minded people, but Your law do I love.
Instead they had some points of controversy with him about their own religion or superstition and concerning one Jesus, Who had died but Whom Paul kept asserting [over and over] to be alive.
They have had knowledge of me for a long time, if they are willing to testify to it, that in accordance with the strictest sect of our religion I have lived as a Pharisee.
You have heard of my earlier career and former manner of life in the Jewish religion (Judaism), how I persecuted and abused the church of God furiously and extensively, and [with fanatical zeal did my best] to make havoc of it and destroy it.
For [although] they hold a form of piety (true religion), they deny and reject and are strangers to the power of it [their conduct belies the genuineness of their profession]. Avoid [all] such people [turn away from them].
External religious worship [ religion as it is expressed in outward acts] that is pure and unblemished in the sight of God the Father is this: to visit and help and care for the orphans and widows in their affliction and need, and to keep oneself unspotted and uncontaminated from the world.