Verses with the word debtor in the New Testament (3 verses):

Matthew 23:16
Woe unto you, ye blind guides, which say, Whosoever shall swear by the temple, it is nothing; but whosoever shall swear by the gold of the temple, he is a debtor!

Romans 1:14
I am debtor both to the Greeks, and to the Barbarians; both to the wise, and to the unwise.

Galatians 5:3
For I testify again to every man that is circumcised, that he is a debtor to do the whole law.