Musar zu Schir haSchirim 5:16

The third trust is concerning his wife, his children, his relatives and his friends. If the one who places his trust in God is a stranger or sojourner without a wife, relative or friend, let him take God as a relative and friend as it is written: "This is my Beloved and this is my Friend" (Eccl. 5:16). And let him consider, "Everyone who has relatives will, after a little while, have to face God alone and no relative, son or friend will be able to help him, nor will any one of these be able to accompany him." And he should also consider when he withdraws to study Torah what burdens could be placed upon him by demanding relatives and consider this to his good, that if he were occupied with these and other worldly matters, he would be much bothered and would have no rest. And when he occupies himself with his future life and with matters of the commandments and uniting his heart with God, then his mind will doubtless be more free and concentrated, because he is alone and without relatives. And, therefore, the ascetics, who declared repeatedly the Oneness of God in their hearts, fled from their homes and relatives to the mountains in order that they might turn their hearts to God.