Narrated by Anas ibnu Malik (RA) :

Allaah’s Messenger (SAW) said :

Nobody who enters Jannah (Paradise) likes to go back to the world even if he got everything on the earth, except a Mujahid who wishes to return to the world so that he may be martyred ten times because of the dignity he receives (from Allaah).

[ Sahih Al-Bukhari, Vol. 4 (Kitab al-Jihad), No. 2629 ]