Revelation 7

As one the elders who stood amongst the throne of God, asks John -

"...What are these which are arrayed in white robes? and whence came they?"  (Revelation 7:13)

He would then answer -

"...These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
15 Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them."  (Revelation 7:14–15)

And he then promised -

"They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat.
17 For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes."  (Revelation 7:16–17)

This should provide great comfort to those that serve in the temple.