וַיִּשְׁלַ֤ח וַיְבִיאֵ֙הוּ֙ וְה֣וּא אַדְמוֹנִ֔י עִם־יְפֵ֥ה עֵינַ֖יִם וְט֣וֹב רֹ֑אִי (פ) וַיֹּ֧אמֶר יְהוָ֛ה ק֥וּם מְשָׁחֵ֖הוּ כִּֽי־זֶ֥ה הֽוּא׃
And he sent, and brought him in. Now he was ruddy, and withal of beautiful eyes, and goodly to look upon. And the LORD said: ‘Arise, anoint him; for this is he.’
Akeidat Yitzchak
The author explains how future events are hinted at in the encounter between Yehudah and Tamar, especially events involving the tribe of Yehudah, the house of David etc.