וַֽיְהִי־רִ֗יב בֵּ֚ין רֹעֵ֣י מִקְנֵֽה־אַבְרָ֔ם וּבֵ֖ין רֹעֵ֣י מִקְנֵה־ל֑וֹט וְהַֽכְּנַעֲנִי֙ וְהַפְּרִזִּ֔י אָ֖ז יֹשֵׁ֥ב בָּאָֽרֶץ׃
E houve uma contenda entre os pastores do gado de Avram e os pastores do gado de Lot. E o Cananeu e o Ferezeu então habitavam na terra.
Akeidat Yitzchak
The reason that sins committed between different human beings are not subject to atonement of Yom Kippur is, that any sin in which man's body is the major party, can only be atoned for by that same body making the appropriate restitution. When reconciling oneself with one's fellow man, it is the senior person, the scholar, who must make the first move, just as Abraham had done with his nephew Lot. (Genesis chapter 13)