This verse is read near the beginning of the Kol Nidrei service. As with the preceding Kol Nidrei and V’nislach, it is traditionally recited three times. The original context to this verse relates to God’s anger following the sin of the spies. Moses invokes a version of the 13 attributes and asks that God forgive the people. Just as God forgave the people then, we hope for his forgiveness on Yom Kippur now.
Salomon Sulzer's solemn composition sustains the reverential mood following Kol Nidrei.