The 142nd mitzvah is that we are commanded to demand and to put pressure on a non-Jew to repay his debts; contrary to our commandment to have pity on a Jew and the prohibition against demanding repayment.1

The source of this commandment is G‑d's statement2 (exalted be He), "You shall collect from a non-Jew."

In the words of the Sifri: "The verse 'You shall collect from a non-Jew,' constitutes a positive commandment."