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: Give peace, O Lord, to those who wait for you, that your prophets be found true. Hear the prayers of your servant and of your people, Israel. (Sirach 36:18)
Responsorial psalm: The Lord is kind and merciful, slow to anger and rich in compassion. (Psalm 103:1-2)
Offertory: Moses consecrated an altar to the Lord, offering upon it holocausts and sacrificing victims. He made an evening sacrifice to the Lord God for an odor of sweetness in the sight of the children of Israel. (Exodus 24:4-5)
Communion: How precious is your mercy, O God! The children of men seek shelter in the shadow of your wings. (Psalm 36:8)
Click the links to see the proper chants as well as the readings and Mass parts: