Sub tuum praesidium (3rd–4th c. papyrus prayer) — Traditional English rendering of the Latin (Roman) text; a literal rendering of the Greek papyrus text is added (public domain)
Latin (Roman Breviary/Liturgy of the Hours text):
Sub tuum praesidium confugimus, Sancta Dei Genetrix. Nostras deprecationes ne despicias in necessitatibus, sed a periculis cunctis libera nos semper, Virgo gloriosa et benedicta.
Traditional English:
We fly to thy protection, O holy Mother of God; despise not our petitions in our necessities, but deliver us always from all dangers, O glorious and blessed Virgin. Amen.
Literal rendering of the Greek of the Rylands papyrus:
Beneath thy compassion, we take refuge, O Theotokos: do not despise our petitions in time of trouble, but rescue us from dangers, only pure one, only blessed one.
Reproduced in full. Translation: Traditional English rendering of the Latin (Roman) text; a literal rendering of the Greek papyrus text is added (Public domain).
Why Pitre cites it
'We take refuge in your mercy, Mother of God. Do not disregard our prayers in troubling times.' The oldest known prayer to Mary — asking her intercession under the title Theotokos before any council.
Notes
Traditional English wording (Raccolta / Roman Breviary form) given; Wikipedia's rendering differs only in 'Do not despise' for 'despise not'. The earliest witness is John Rylands Library Greek Papyrus 470 (P.Ryl. III 470), Manchester, whose Greek text already addresses Mary as Theotokos; papyrologist Edgar Lobel (followed by C. H. Roberts) dated it to the 3rd–4th century, though some scholars (e.g. Hans Förster) argue for a later date. The Latin form is attested from the 11th century.