1 Corinthians 9:16

16IfἐὰνforγὰρI preach the gospelεὐαγγελίζωμαι,nothingοὐκthere isἔστινto meμοιboastingκαύχημα,necessityἀνάγκηforγάρmeμοιis laid uponἐπίκειται·Woeοὐαὶhoweverγάρto meμοίbeἐστινifἐὰνnotμὴI should preach the gospelεὐαγγελίσωμαι.

For if I preach the gospel, there is no boasting to me, for necessity is laid upon me. But woe be to me if I should not preach the gospel!