Romans 15:17 in the King James Version
I have therefore whereof I may glory through Jesus Christ in those things which pertain to God.
Context
16 that I should be a servant of Christ Jesus to the Gentiles, serving as a priest of the Good News of God, that the offering up of the Gentiles might be made acceptable, sanctified by the Holy Spirit.
17 I have therefore my boasting in Christ Jesus in things pertaining to God.
18 For I will not dare to speak of any things except those which Christ worked through me for the obedience of the Gentiles, by word and deed,