The Flight of Our Lord Jesus Christ into Egypt
(Pro aliquibus locis)
Angelus Dómini appáruit in somnis Joseph, dicens: Surge et áccipe Púerum et Matrem ejus, et fuge in Aegýptum. * Ecce, elongávi fúgiens: et mansi in solitúdine.
The angel of the Lord appeared in a dream to Joseph, saying: Arise and take the boy and His mother, and fly into Egypt. * Behold, I have gone far off flying away; and I abode in the wilderness.
(St Matthew 2:13 and Psalm 54:8 from the Introit of Mass)
Protéctor in te sperántium, Deus, qui Unigénitum tuum, Redemptórem nostrum, ex Heródis gladio fuga in Aegýptum erípere voluísti: concéde nobis fámulis tuis, beatíssima semper Vírgine, ejus Matre María, intercedénte; ut, ab ómnibus mentis et córporis perículis liberáti, ad coeléstem pátriam perveníre mereámur.
O God, the protector of those who hope in Thee, who willed Thine only Son, our Redeemer, to escape the sword of Herod by flight into Egypt; grant unto us Thy servants that, by the intercession of the ever most blessed Virgin, Thy mother Mary, we may be freed from all dangers of mind and body, and be made worth to arrive at our heavenly homeland.
The Continuation of the Holy Gospel according to Matthew
And after they were departed, behold an angel of the Lord appeared in sleep to Joseph, saying: Arise, and take the child and his mother, and fly into Egypt: and be there until I shall tell thee. For it will come to pass that Herod will seek the child to destroy him. Who arose, and took the child and his mother by night, and retired into Egypt: and he was there until the death of Herod: That it might be fulfilled which the Lord spoke by the prophet, saying: Out of Egypt have I called my son.
(St Matthew 2:13-15.)
From Wikipedia: http://en.wikipedia.org/wiki/Flight_to_Egypt