פירוש על קידושין 60:2

When people begin to learn Torah together, they argue, neither seeing what the other is trying to say. But by the time they are done, they will come to love each other, to appreciate what the other is saying. This is read midrashically into a verse. The verse begins with “the wars of the Lord.” But the end of the verse quotes some difficult words “vahav besufah.” “Vahav” the rabbis read as related to “ahavah,” “love.” “Besufah” they change to “besofah” which means “at the end. So there is war in the beginning but love at the end.