This paper explores an intertextual echo in the Day of Atonement ceremonies that has largely gone unnoticed in scholarship. After purifying the sanctuary with the blood of sacrifice, Aaron presents a live goat and confesses over it “all the iniquities [‘awon] of the people of Israel and all their transgressions [pesha‘]—all their sins [chatta’t]” (Lev 16:21). Commentators note that the high priest’s confession uses three different words to express the totality of sin the animal substitute will carry into the wilderness. What has gone unnoticed, however, is that the language subtly reprises the Lord’s character revealed at Sinai as “merciful and gracious…forgiving iniquity [‘awon], transgression [pesha‘], and sin [chatta’t]” (Ex 34:7). This inner-biblical allusion links the annual rite of atonement to Israel’s original breach of covenant and its subsequent renewal (Ex 32–34). When the narrative lens is widened, the similarities between the two passages go beyond mere lexical correspondence, with the implication that when the high priest enters the Holy of Holies once a year, he re-enacts Moses’s entrance into the cloud on Sinai’s summit to intercede on the nation’s behalf. The work of atonement is understood as securely rooted in the Lord’s revealed character and in his own commitment to his redemptive purposes. The paper will conclude with a reflection on the role the Day of Atonement may have had in preserving and perpetuating the creedal confession of the Lord’s divine name and character (Pss. 86:5, 15; 103:8; 111:4; 112:4; 116:5; 145:8; Joel 2:13; Jonah 4:2; Nah. 1:3; Neh. 9:17, 31; 2 Chron. 30:9).