1 Corinthians 16:9

because a great door [of opportunity] has opened up to me [here] for doing an effective work [for God], but there are [also] many enemies who oppose me. [See Acts 19].

Treasury of Scripture Knowledge

Summary

Now when the adversaries of Judah and Benjamin heard that the children of the captivity builded the temple unto the LORD God of Israel;

The adversaries

Bible References

The adversaries

1 Corinthians 16:9
because a great door [of opportunity] has opened up to me [here] for doing an effective work [for God], but there are [also] many enemies who oppose me. [See Acts 19].