מדרש על אבות 1:17

R. Simeon the son of Gamliel declared: I was reared among the sages, and I discovered that there was nothing more beneficial for a person than silence.⁷Pirkei Avot 1:17. Rachel forced herself to remain silent, and her offspring continued the tradition of silence. She saw her gifts in her sister’s hand and remained silent. Her son Benjamin, whose stone in the high priest’s breastplate was a jasper, knew of the sale of Joseph and remained silent. The word jasper (yashfeh) may be read as “he has a mouth” (yesh peh) but nevertheless remains silent. Saul was descended from her: But concerning the matter of the kingdom, he told him not (I Sam. 10:16). Regarding Esther (another descendant) it is said: Esther had not made known her people nor her kindred (Est. 2:10).