The ninth VNO Mass is for Vocations to Holy Orders. The fourteenth is for the same intention for religious life. In the 1998/2002 Lectionary, the two are listed together. Not so in the Roman Missal.
The readings are as one might expect: the call of various Old Testament persons: Abram, Moses, the prophets. Gospel readings are on a similar theme: the call of the disciples. One that stands out for me is John 15:9-17, in which the Lord counsels imitation: laying down one’s life.
The priest texts for the collect and post-Communion prayers have options when they are offered by a religious priest. The antiphons aren’t deeply inspired:
Entrance Antiphon Mt 19:21
If you would be perfect, go, sell what you have, give to the poor, and follow me, says the Lord.
Communion Antiphon Cf. Mt 19: 27-29
Amen, I say to you: That you who have left all and followed me will receive a hundredfold and possess eternal life, says the Lord.
Responsorial Psalms for this Mass are 16, 27, 40, and 84. Whichever one isn’t chosen for the Liturgy of the Word would be as good a choice as any for an Old Testament passage. A few New Testament choices might be the Beatitudes or 1 Corinthians 13, especially verses 4 through 7.
Some years ago, we blogged on Masses And Prayers For Various Needs And Occasions. In the GIRM, sections 368-378 cover the universal regulations on their use. You can check our brief comments here and here and here. The USCCB’s unannotated text on the matter is here.