Verses with the word religion in the New Testament (5 verses):

Acts 26:5
Which knew me from the beginning, if they would testify, that after the most straitest sect of our religion I lived a Pharisee.

Galatians 1:13
For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it:

Galatians 1:14
And profited in the Jews' religion above many my equals in mine own nation, being more exceedingly zealous of the traditions of my fathers.

James 1:26
If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.

James 1:27
Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.