The one who is taught the word is to share all good things with the one who teaches him.
1 Corinthians 9:11
If we sowed spiritual things in you, is it too much if we reap material things from you?
1 Corinthians 9:14
So also the Lord directed those who proclaim the gospel to get their living from the gospel.
2 Timothy 4:2
preach the word; be ready in season and out of season; reprove, rebuke, exhort, with great patience and instruction.