[5-8]: An echo of the liturgical prayer prayed by the deacon or priest before reading the gospel and preaching the sermon at mass: Munda cor meum, ac labia mea, omnipotens Deus … ut sanctum Evangelium tuum digne valeam nuntiare ‘Lord, cleanse my heart and my lips, … that I might worthily proclaim your holy gospel’ (Innocentius III, Ordo Missae, col. 766; Eisenhofer and Lechner 1960, 291).