הלכה על אבות 1:12

He also writes there in Law 7: "A Talmid Chacham shouldn't shout when he is talking; he shouldn't raise his voice, but rather speak softly with all the creations (i.e. humans). And when he speaks softly, he should not speak from too far a distance lest he sound haughty. Also, he should precede his friend in greeting. And judge every person with the benefit of the doubt. He should mention his friend's praises and never his friends faults. 'Love peace and chase peace.' (Avot 1:12). If he sees that his words will be helpful and heard — he should speak. Otherwise — he should keep silent... And he should not speak except with wisdom and kindness etc. And he should not converse with a woman in the market, even if she is his wife or his sister or his daughter." And all the more so he should not become accustomed to swears and oaths. Also, he shouldn't eat his meals in a lot of places. And he should distance himself from settlements of fools and from people who are not respectable.