קבלה על במדבר 16:9

Division certainly applies to the left alone, as is written in relation to the second day: "And let it divide." (Ibid. 6) While of Korah, it is written: "Is it but a small thing to you, that the Elohim of Yisrael has separated you" (Numbers 16:9). It is also written: "At that time Hashem separated the tribe of Levi" (Deuteronomy 10:8). So, assuredly the separation appears only in the second day in the place of the left.