In 2 Thessalonians 3:8, Paul says they did not eat anyone's food without doing what?

Answer: Paying for it

Paul and his companions did not eat anyone's food without paying; they worked night and day so as not to be a burden.

“For you yourselves know how you ought to imitate us, because we were not undisciplined among you, nor did we eat anyone’s food without paying for it. Instead, in labor and toil, we worked night and day so that we would not be a burden to any of you.”— 2 Thessalonians 3:7-8 (BSB)