וַיִּקַּ֨ח תֶּ֜רַח אֶת־אַבְרָ֣ם בְּנ֗וֹ וְאֶת־ל֤וֹט בֶּן־הָרָן֙ בֶּן־בְּנ֔וֹ וְאֵת֙ שָׂרַ֣י כַּלָּת֔וֹ אֵ֖שֶׁת אַבְרָ֣ם בְּנ֑וֹ וַיֵּצְא֨וּ אִתָּ֜ם מֵא֣וּר כַּשְׂדִּ֗ים לָלֶ֙כֶת֙ אַ֣רְצָה כְּנַ֔עַן וַיָּבֹ֥אוּ עַד־חָרָ֖ן וַיֵּ֥שְׁבוּ שָֽׁם׃
И взял Фарра Аврама, сына его, и Лота, сына Харрана, сына его,'сын, и Сара, его невестка, его сын Абрам'с женой; и пошли с ними из Ура Халдеев, чтобы идти в землю Ханаанскую; и пришли в Харран и жили там.
Rashi
ויצאו אתם AND THEY WENT FORTH WITH THEM — ויצאו אתם Terah and Abram went forth with Lot and Sarai.
Ramban
AND THEY WENT FORTH WITH THEM FROM UR OF THE CHALDEES. Because Abram was more important than his father and those that followed his counsel and for whose sake they went, Scripture says, And they went forth, [rather than “he went forth”] even though it says at the beginning of the verse, And Terah took. Lot and Sarai, however, went with them to the land of Canaan on account of Abram, for even after Abram separated from his father they went along with him.382The Tur concludes: “Thus it should have said, ‘and they walked with him,’ that is with Abram. But out of respect to his father, Scripture ascribes it to both of them.”
Radak
ויקח תרח, After G’d had told Avram to move to the land of Canaan (12,1) and Avram had told his father about this vision, Terach took him and set out on the journey towards the land of Canaan. Seeing that Terach was willing to accept these instructions Avram had received from G’d, he deserved that the initial stages of this trip be credited to him. After all, he was the father, and the sons were his offspring. Seeing that Lot’s father was no longer alive, and he had to depend on his family, Terach took his whole family with him.