Midrash su Ester 2:20

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).

“Esther did not disclose her family or her people, as Mordekhai had commanded her; Esther followed Mordekhai’s instructions, as it was when she was fostered by him” (Esther 2:20).
“Esther did not disclose her family” – teaching that she practiced silence for herself, like her ancestor Rachel, who practiced the craft of silence; all her great descendants maintained silence. Rachel adopted the craft of silence – she saw her betrothal gifts in the possession of her sister and she was silent. Benjamin her son practiced silence – know, as his stone in the breast piece was a chalcedony [yashefe], [i.e.,] he had a mouth [yesh peh],¹⁶He knew that his brothers had sold Joseph. but was silent. Saul, her grandson¹⁷Not literally her grandson, but descendant. – “but the matter of the kingdom…he did not tell him” (I Samuel 10:16). Esther – “Esther did not disclose her family or her people.”