Even a father and son, a teacher and student, who study Torah together in one gate become enemies of each other, and do not leave there until they become beloved to each other, as it is said: 'Et vahev besufah'—do not read 'besufah' (in the storm), but 'besofah' (at its end).
אפילו האב ובנו, הרב ותלמידו, שעוסקין בתורה בשער אחד נעשים אויבים זה את זה, ואינם זזים משם עד שנעשים