Matthew 22:32
" '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."
Mark 12:26-27
"As for the dead being raised, have you not read in the Book of Moses, in the passage about the bush, how God told him, 'I am the God of Abraham, the God of Isaac, and the God of Jacob'? He is not God of the dead but of the living. You are greatly misled."
Luke 20:37-39
"[Moses] called 'Lord' the God of Abraham, the God of Isaac, and the God of Jacob; and he is not God of the dead, but of the living, for to him all are alive." Some of the scribes said in reply, Teacher, you have answered well."
Only God and those in Heaven knows where Mary is. There is no doubt some saints have been raised for Gods purposes.We know Abraham, Moses and others have been raised as surely as there are many who have not been.
1Thess. 4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first.