Imam Hasan al-Basri said:
We laugh and yet – who knows? – perhaps Allāh has looked at some of our works and said: “I will not accept anything from you.” Woe to you, son of Adam! Can you fight Allāh? Whoever disobeys Allāh is fighting Him. By Allāh! I have met seventy veterans of Badr. Most of their garments were wool. Had you seen them you would have said they are crazy, and had they seen the best among you they would have said: “Those people will have no part in the Hereafter.” Had they seen the worst among you they would have said: “Those people do not believe in the Day of Reckoning.” I have seen people for whom this world was cheaper than the dust under their feet. I have seen people the like of whom would come home at night, not finding more than his own portion of food, and yet say: “I shall not put all of this into my belly. I shall certainly give some away for Allāh’s sake.” Then he would give away some of his food in charity, even if he were more in need of it than its recipient.
Reference : Hilaya Al-Awliya