it is written
1 Corinthians 9:9
9:9 it is written. This passage is quoted from Deuteronomy 25:4. See also I Timothy 5:18. Paul stressed that, even though he had a right to marry, he chose not to for the gospel’s sake. Similarly, he and others who preach the gospel had the right to be supported by those who had profited thereby (I Corinthians 9:14), but he chose not to, in order not to be a stumblingblock to those who needed it (I Corinthians 9:15).