Strong's Greek #1479
ἐθελοθρησκίᾳ

Englishman's Concordance (References)

ἐθελοθρησκίᾳ ethelothrēskia — 1 Occurrence

Colossians 2:23 - N-DFS
GRK:σοφίας ἐν ἐθελοθρησκίᾳ καὶ ταπεινοφροσύνῃ
NAS: of wisdom in self-made religion and self-abasement
KJV: in will worship, and
INT: of wisdom in voluntary worship and humility