TT #650 · Parashas Ki Seitzei · Seventh Aliyah · Passuk 25:05
When brothers dwell together and one of them dies and has no son, the wife of the dead shall not be outside to a strange man; her husband’s brother shall come upon her and take her to himself as a wife and perform the duty of a husband’s brother for her.
Torah Temimah points to Yevamot 22b.
TT lemma: וּבֵן אֵין לוֹ.
וּבֵן אֵין לוֹ – אֵין לוֹ בֵּן, אֲבָל יֵשׁ לוֹ בַּת, אוֹ בֶּן הַבֵּן, אוֹ בַּת הַבֵּן, אוֹ בֶּן הַבַּת, אוֹ בַּת הַבַּת – אֵין זֶה יָבָם.
English: “And he has no son” — if he has no son, but he has a daughter, or a son’s son, or a son’s daughter, or a daughter’s son, or a daughter’s daughter, there is no yibbum.
On the daf / in context: Any offspring in the direct line, male or female, descending or through daughters, releases the widow from the bond of yibbum.
Ribbui / expansive reading of “son.”
Any descendant (son, daughter, or grandchild through either) exempts the widow from yibbum and chalitzah.