At every Mass we sing or say the words of the Ordinary (the unchangeable parts of the Mass), for example, the Gloria; Holy, holy, holy; and Lamb of God.
The Mass also includes what are called the propers—texts that change for each Sunday and solemnity. These include the introit (entrance chant), the responsorial psalm, the offertory chant, and the Communion chant.
Here are the proper texts to be sung today at the 8 and 10 a.m. Masses:
Introit: Within your will, O Lord, all things are established, and there is none that can resist your will. For you have made all things, the heaven and the earth, and all that is held within the circle of heaven; you are the Lord of all. (Esther 13:9-10)
Responsorial psalm: The vineyard of the Lord is the house of Israel. (Isaiah 5:7)
Offertory: In you, O Lord, I have placed my hope. I said, You are my God; my times are in your hands. (Psalm 31:1, 15-16)
Communion: In salutari tuo anima mea, et in verbum tuum speravi: quando facies de persequentibus me iudicium? iniqui persecuti sunt me, adiuva me, Domine Deus meus. (Psalm 118:81, 84, 86)
English translation: My soul aspires after your salvation; I hope in your word. When will you judge those who persecute me? The wicked are persecuting me; come to my assistance, O Lord, my God. (Psalm 118:81, 84, 86)