Genesis 38:25 Second Temple Literature: On the Change

הִ֣וא מוּצֵ֗את וְהִ֨יא שָׁלְחָ֤ה אֶל־חָמִ֙יהָ֙ לֵאמֹ֔ר לְאִישׁ֙ אֲשֶׁר־אֵ֣לֶּה לּ֔וֹ אָנֹכִ֖י הָרָ֑ה וַתֹּ֙אמֶר֙ הַכֶּר־נָ֔א לְמִ֞י הַחֹתֶ֧מֶת וְהַפְּתִילִ֛ים וְהַמַּטֶּ֖ה הָאֵֽלֶּה׃

When she was brought forth, she sent to her father-in-law, saying: ‘By the man, whose these are, am I with child’; and she said: ‘Discern, I pray thee, whose are these, the signet, and the cords, and the staff.’

On the Change of Names

[134] And Tamar too; she bore within her womb the divine seed, but had not seen the sower.  For we are told that at that hour she veiled her face (Gen. 38:15), just as Moses when he turned aside fearing to look upon God (Ex. 3:6). But she closely scanned the symbols and tokens, and judging in her heart that these were the gifts of no mortal she cried aloud, “To whomsoever these belong, he it is by whom I am with child” (Gen. 38:25).
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