Dona nobis pacem (Latin for "Grant us peace", dona nobis pacem) is a phrase in the Agnus Dei section of the mass. The phrase, in isolation, has been appropriated for a number of musical works, which include:
The phrase is used by the Doctor - season 4, episode 6 of Doctor Who, The Poison Sky - when speaking in code to Donna Noble who is trapped on the TARDIS by the Sontarans. (Original airdate: 3 May 2008)
Sister Steven, a character in the comic strip 9 Chickweed Lane repeatedly uses the phrase when her patience is being tried.
The phrase is repeated in the song Old City (Instrumental) on the album Instrumentals by the Shanghai Restoration Project (2008).