Matthew 9:24 ...'He said unto them, Give place: for the maid is not dead, but SLEEPTH. And they laughed him to scorn.'
John 11:11-14 ...'These things said he: and after that he saith unto them, Our friend Lazarus SLEEPTH; but I go, that I may awake him out of sleep. Then said his disciples, Lord, if he sleep, he shall do well. Howbeit Jesus spake of his death: but they thought that he had spoken of taking of rest in sleep. Then said Jesus unto them plainly, LAZARUS IS DEAD.'
So Jesus spoke of death as sleeping. Not about going to heaven or hell when we die, but sleeping. And until when do we sleep in the grave? Martha knew the answer ... John 11:23-24 ...'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.' ... You see Martha knew that Lazarus would rise again at the resurrection, which would be Jesus' second coming, but as we know, Jesus decided to resurrect Lazarus there and then.