John Calvin on Genesis 24:63

63. And Isaac went out. It appears that Isaac dwelt apart from his father; either because the family was too large, or because such was the custom. And perhaps Abraham had already married another wife; so that, for the sake of avoiding contentions, it would seem more convenient for him to have a house of his own. Thus great wealth has its attendant troubles. Doubtless, of all earthly blessings granted by God, none would have been sweeter to Abraham than that of living with his son. However, I by no means think that he was deprived of his society and assistance. For such was the piety of Isaac, that he undoubtedly studied to discharge every duty towards his father: this alone was wanting, that they did not live in the same house. Moses also relates how it happened that Isaac met with his wife before she reached his home. For he says, that Isaac went out in the evening to meditate or to pray. For the Hebrew word שוח (soach) may mean either. It is probable that he did this according to his custom, and that he sought a place of retirement for prayer, in order that his mind, being released from all avocations, might be the more at liberty to serve God. Whether, however, he was giving his mind to meditation or to prayer, the Lord granted him a token of his own presence in that joyful meeting.