The messenger that Mary and Martha sent for
Jesus had a long way to go. The message they
had for Jesus was touching. They didn't make a
request of any kind or ask Him to hurry to them.
They simply said, "Lord, behold, he whom thou
lovest is sick" John 11:3

Their words were calm and serene even though
the situation was dire.

When Jesus was found and He had received the
message, He said, "This sickness is not unto
death, but for the glory of God, that the Son of
God might be glorified thereby" (verse 4)

Jesus knew the end from the beginning and that
Lazarus more than likely had already died. He
also knew what He was going to do. The disciples
of course didn't understand any of it.