First reading Isaiah 22:15, 19-23

‘I will place on his shoulder the key of the house of David.’

Thus says the Lord God of hosts, ‘Come, go to this steward, to Shebna, who is over the household, and say to him: “I will thrust you from your office, and you will be pulled down from your station. In that day I will call my servant Eliakim the son of Hilkiah, and I will clothe him with your robe, and will bind your sash on him, and will commit your authority to his hand. And he shall be a father to the inhabitants of Jerusalem and to the house of Judah. And I will place on his shoulder the key of the house of David. He shall open, and none shall shut; and he shall shut, and none shall open. And I will fasten him like a peg in a secure place, and he will become a throne of honour to his father’s house.” ’

The word of the Lord

Responsorial Psalm Ps 138(137):1-2a. 2bc, 3. 6, 8bc. ℟8bc

O Lord, your merciful love is eternal;

discard not the work of your hands.

I thank you, Lord, with all my heart;

you have heard the words of my mouth.

In the presence of the angels I praise you.

I bow down towards your holy Temple. 

O Lord, your merciful love is eternal;

discard not the work of your hands.

I give thanks to your name

for your merciful love and your faithfulness.

On the day I called, you answered me;

you increased the strength of my soul. 

O Lord, your merciful love is eternal;

discard not the work of your hands.

The Lord is high, yet he looks on the lowly,

and the haughty he knows from afar.

O Lord, your merciful love is eternal;

discard not the work of your hands. 

O Lord, your merciful love is eternal;

discard not the work of your hands.

Second readingRomans 11:33-36

‘From him and through him and to him are all things.’

Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgements and how inscrutable his ways! ‘For who has known the mind of the Lord, or who has been his counsellor?’ ‘Or who has given a gift to him that he might be repaid?’ For from him and through him and to him are all things. To him be glory for ever. Amen.

The word of the Lord

Gospel Acclamation Matthew 16:18

Alleluia, alleluia.

You are Peter, and on this rock I will build my Church,

and the gates of hell shall not prevail against it.

Alleluia.