Babylonian Talmud, Yoma 86a - 1

If a person studies Scripture and Mishnah, and attends on the disciples of the wise, is honest in business, and speaks pleasantly to people, what do people then say concerning them? ‘Happy is the parent who taught that person Torah, happy is the teacher who taught that person Torah; woe to people who have not studied the Torah; for this person has studied the Torah - look how fine their ways are, how righteous their deeds! Of them does Scripture say: And God said to me: You are My servant, Israel, in whom I will be glorified.’ But if someone studies Scripture and Mishnah, attends on the disciples of the wise, but is dishonest in business, and discourteous in one’s relations with people, what do people say? ‘Woe to the person who studied the Torah, woe to their parent who taught that person Torah; woe to their teacher who taught that person Torah!’ This person studied the Torah: Look, how corrupt are their deeds, how ugly their ways; of them Scripture says: ‘These are the people of the Lord, and are gone forth out of God’s land.’ (Ezekiel 36) [Soncino translation. Edited for gender neutrality]