Because of famine, Avraham had to temporarily give up his isolation. Upon his return to the land of Canaan he wanted to return to the place where God had first appeared to him – the place where the significance of that land for the future, and the need for his isolation in the present, had been revealed to him. See 12A and 12G.
He now resumed his work of summoning people in the name of God.
Beraishis 13:1
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