Psalm 40:7-11 and Isaiah 7:10-14; 8:10

Psalm 40:7-11
7 Sacrifice and oblation, you did not want. But you have perfected ears for me. Holocaust and sin offering, you did not require.
8 Then I said, "Behold, I draw near." At the head of the book, it has been written of me:
9 that I should do your will. My God, I have willed it. And your law is in the midst of my heart.
10 I have announced your justice in a great Church: behold, I will not restrain my lips. O Lord, you have known it.
11 I have not concealed your justice within my heart. I have spoken your truth and your salvation. I have not concealed your mercy and your truth from a great assembly.
Isaiah 7:10-14; 8:10
10 And the Lord spoke further to Ahaz, saying:
11 Ask for a sign for yourself from the Lord your God, from the depths below, even to the heights above.
12 And Ahaz said, "I will not ask, for I will not tempt the Lord."
13 And he said: "Then listen, O house of David. Is it such a small thing for you to trouble men, that you must also trouble my God?
14 For this reason, the Lord himself will grant to you a sign. Behold, a virgin will conceive, and she will give birth to a son, and his name will be called Immanuel.
10 Undertake a plan, and it will be dissipated! Speak a word, and it will not be done! For God is with us.