Ezekiel 37:1-28:

 "The hand of the LORD was upon me, and he brought me out by the Spirit of the LORD and set me in the middle of a valley; it was full of bones.
He led me back and forth among them, and I saw a great many bones on the floor of the valley, bones that were very dry.
He asked me, "Son of man, can these bones live?" I said, "O Sovereign LORD, you alone know."
 Then he said to me, "Prophesy to these bones and say to them, `Dry bones, hear the word of the LORD!
 This is what the Sovereign LORD says to these bones: I will make breath enter you, and you will come to life.
 I will attach tendons to you and make flesh come upon you and cover you with skin; I will put breath in you, and you will ; come to life. Then you will know that I am the LORD.'"
 So I prophesied as I was commanded. And as I was prophesying, there was a noise, a rattling sound, and the bones came together, bone to bone.
 I looked, and tendons and flesh appeared on them and skin covered them, but there was no breath in them.
 Then he said to me, "Prophesy to the breath; prophesy, son of man, and say to it, `This is what the Sovereign LORD ; says: Come from the four winds, O breath, and breathe into these slain, that they may live.'"
 So I prophesied as he commanded me, and breath entered them; they came to life and stood up on their feet--a vast ; army.
 Then he said to me: "Son of man, these bones are the whole house of Israel. They say, `Our bones are dried up and our ; hope is gone; we are cut off.'
 Therefore prophesy and say to them: `This is what the Sovereign LORD says: O my people, I am going to open your graves and bring you up from them(the Resurrection); I will bring you back to the land of Israel(heaven).
 Then you, my people, will know that I am the LORD, when I open your graves and bring you up from them.
 I will put my Spirit in you and you will live, and I will settle you in your own land.(heaven) Then you will know that I the LORD have spoken, and I have done it, declares the LORD.'"(this is what is meant by "my peace I give you", it is repeated during mass)

The same promise is given by Jesus, as it was revealed to Him by the Father.

Matthew22:23-40
That same day the Sadducees, who say there is no resurrection, came to him with a question. "Teacher," they said, "Moses told us that if a man dies without having children, his brother must marry the widow and; have children for him. Now there were seven brothers among us. The first one married and died, and since he had no children, he left his wife to his brother. The same thing happened to the second and third brother, right on down to the seventh. Finally, the woman died. Now then, at the resurrection, whose wife will she be of the seven, since all of them were married to her?"
Jesus replied, "You are in error because you do not know the Scriptures or the power of God. At the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven. But about the resurrection of the dead--have you not read what God said to you, `I am the God of Abraham, the God of Isaac, and the God of Jacob'? He is not the God of the dead but of the living."

Happy Easter!