Mark 12:23 (KJV)

Then come unto him the Sadducees, which say there is no resurrection; and they asked him, saying,

Master, Moses wrote unto us, If a man's brother die, and leave his wife behind him, and leave no children, that his brother should take his wife, and raise up seed unto his brother.

Now there were seven brethren: and the first took a wife, and dying left no seed.

And the second took her, and died, neither left he any seed: and the third likewise.

And the seven had her, and left no seed: last of all the woman died also.

And Jesus answering said unto them, Do ye not therefore err, because ye know not the scriptures, neither the power of God?

For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven.

And as touching the dead, that they rise: have ye not read in the book of Moses, how in the bush God spake unto him, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob?

He is not the God of the dead, but the God of the living: ye therefore do greatly err.

And one of the scribes came, and having heard them reasoning together, and perceiving that he had answered them well, asked him, Which is the first commandment of all?