This seems plainly stated in the Fourth Gospel, here:
John 11:17-27 Then when Jesus came, he found that he had lain in the grave four days already. Now Bethany was nigh unto Jerusalem, about fifteen furlongs off: And many of the Jews came to Martha and Mary, to comfort them concerning their brother. Then Martha, as soon as she heard that Jesus was coming, went and met him: but Mary sat still in the house. Then said Martha unto Jesus, Lord, if thou hadst been here, my brother had not died. But I know, that even now, whatsoever thou wilt ask of God, God will give it thee. Jesus saith unto her, Thy brother shall rise again. Martha saith unto him, I know that he shall rise again in the resurrection at the last day. Jesus said unto her, I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live: And whosoever liveth and believeth in me shall never die. Believest thou this? She saith unto him, Yea, Lord: I believe that thou art the Christ, the Son of God, which should come into the world.
Well, that seems conclusive to me; but the mainstream view is that Lazarus cannot have been resurrected because Jesus was the first to be resurrected - therefore this passage must be explained-away; and it is.
When we regard Lazarus as having been resurrected, it does change a great deal of the 'standard' understanding of what Jesus did, and how he did it. It seems that being resurrected 'at the last day' was already expected among Jesus' followers, and was not an achievement of Jesus.
What new thing Jesus brought was not resurrection; but the quality of that resurrected life; which is probably the main subject of the Fourth Gospel - in its many 'metaphors' (water, wine, bread, light etc) contrasting this mortal life with 'everlasting' life.
It was already expected that Men would be resurrected to dwell in Paradise (ie. a better after-life, but qualitatively similar to mortal life); and what Jesus newly-brought was resurrection into Heaven.
