Genèse 11:31

And Terah took Abram his son, and Lot bar Haran, the son of his son, and his daughter-in-law Sara the wife of Abram his son, and went forth with them from Ura of the Kasdai, to go to the land of Kenaan. And they came unto Haran, and dwelt there.

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.,’ that is with Abram. But out of respect to his father, Scripture ascribes it to both of them.”

ללכת ארצה כנען, this land is prepared for enabling its residents to acquire all intellectual advantages, and, as far as G’d is concerned, it is the most preferred of all the countries on earth. We have this on the authority of the Torah itself which says of that land (Deuteronomy 11,12) ארץ אשר ה' אלוקיך דורש אותה תמיד עיני ה' אלוקיך בה מרשית השנה ועד אחרית שנה, “and concerning which G’d enquires constantly, His eyes being trained on it from the beginning of the year until the year’s end.” The climate of the land of Canaan had not been negatively affected by the rains of the deluge, as had the climate of all other parts of the globe. We have this on the authority of Ezekiel 22,24 ארץ לא גשמה ביום זעם, “a land which did not experience rain on the day of the fury.” This may well be the reason why the sages (Baba Batra 58) said that the climate of the land of Israel makes people smarter.

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.

ויצא אתם, this is the first time that the departure from Ur Casdim is portrayed as having been initiated by Avram, his father appearing as traveling with his son. The reason is that the command to migrate was issued to Avram (and wife) and not to Terach. The latter joined Avram and he took his grandson and his livestock with him. This is why the Torah added the word אתם, “with them.”

ללכת ארצה כנען, actually, G’d had not told Avram to go to the land of Canaan, as anyone reading 12,1 will have no difficulty in ascertaining. He had reserved for Himself the right to tell Avram a specific destination at a later stage. The fact was that the first country under a different rule they encountered would be the land of Canaan. Avraham was aware that once in the land of Canaan he could expect further directives from G’d so that it would become clear which country G’d wanted him to settle in.

וישבו שם, they experienced a delay in Charan. Terach, after initially agreeing to move to the land of Canaan, had changed his mind in the interval since leaving Ur Casdim. He simply could not completely sever his links with his birthplace. He felt that by settling in Charan, which was on the border between Ur Casdim and the land of Canaan, he had complied with G’d’s command to Avraham to emigrate. By staying in Charan he felt he would not be too distant from Avraham, while not having severed his ties with his homeland completely. Avraham moved on. When the Torah described Avram’s wife Sarai as Terach’s daughter-in-law, something that appears to be self-evident, this is only meant to convey to us the readers, that Sarai was very willing to uproot herself and to move on with her husband. She was his wife in the first instance, and her relationship to Terach both as daughter-in-law and as granddaughter was of a secondary consideration. She had full faith in the Lord, the G’d of Avram, and was prepared to carry out His will.