Мишна́ к Берешит 3:26

Shimon, his son, used to say: all my days I grew up among the sages, and I have found nothing better for a person than silence. Study is not the most important thing, but actions; whoever indulges in too many words brings about sin.

Rabbi Shimon ben Elazar said: Do not try to appease your friend during his hour of anger; Nor comfort him at the hour while his dead still lies before him; Nor question him at the hour of his vow; Nor strive to see him in the hour of his disgrace.