Antiphona ad Offertorium.
Latin text
Antiphona ad Offertorium. Textus proprius diei liturgici.
Context
The Offertory antiphon is the proper chant at the beginning of the offertory.
Source: Missale Romanum 1962, proper Mass texts selected by Liturgical Day, as published by Divinum Officium.
Divinum Officium