2 Corinthians 10:16 in the World English Bible
so as to preach the Good News even to the parts beyond you, not to boast in what someone else has already done.
Context
15 Not boasting of things without our measure, that is, of other men’s labours; but having hope, when your faith is increased, that we shall be enlarged by you according to our rule abundantly,
16 To preach the gospel in the regions beyond you, and not to boast in another man’s line of things made ready to our hand.
17 But he that glorieth, let him glory in the Lord.