Rashi on Genesis 38:26/רש"י על בראשית ל״ח:כ״ו

1צדקה SHE IS RIGHTEOUS (right) in what she has said

2ממני FROM ME is she with child. Our Rabbis, of blessed memory, explained this to mean that a Bath-kol came forth and said the word ממני — from Me and by My agency have these things happened: because she proved herself a modest woman whilst in her father-in-law’s house I have ordained that kings shall be descended from her, and I have already ordained that I would raise up kings in Israel from the tribe of Judah (Genesis Rabbah 85:11) (therefore I have brought it about that these two persons who are to be the ancestors of kings should unite to become so).

3כי על כן לא נתתיה BECAUSE THAT I GAVE HER NOT — For (כי) she has acted rightly, because (על כן) I did not give her to Shelah, my son.

4ולא יסף עוד AND HE KNEW HER AGAIN NO MORE — Some explain that ולא יסף means he did not continue to know her (Sifrei Bamidbar 88): others explain that it means he did not cease to know her (Sotah 10b). An exactly similar instance occurs in reference to Eldad and Medad (Numbers 11:25), where ולא יספו which some translate “and they did not continue to prophesy” is translated in the Targum by “and they did not cease to prophesy”.