LEV181 This concept (I.e. that repentance alone is not enough for atonement] is further clarified in the Torah, for [this verse]. We see that after repentance there [still] is a need for the atonement of Yom Kippur (since the main atonement of Yom Kippur is effected by repentance) [Yom Kippur cannot atone without repentance Yoma 85b; see Mishneh Torah, Hilchos Teshuvah 1:3, with Kesef Mishneh). Perforce there must be repentance; still, it is not enough.]