Importance Of Wudu

Mu'adh ibne-Jabal (RadhiAllaho anho) narrates
that Nabi (Sallallahu Alaihi Wasallam) said:

There is not a Muslim who goes to bed
remembering Allah in a state of purity
( after having performed Wudu ),
wakes up during the night,
then ask Allah Subhanahu wa ta'ala
to provide him with the good of this world
and that of the Hereafter,
except that Allah Subhanahu wa ta'ala
will grant that to him.

{ Abu Dawud }