Sahih al-Bukhari 2293 (Book 43, Hadith 4)

Narrated Abu Dhar: Once, while I was in the company of the Prophet, he saw the mountain of Uhud and said, “I would not
like to have this mountain turned into gold for me unless nothing of it, not even a single Dinar remains
of it with me for more than three days (i.e. I will spend all of it in Allah’s Cause), except that Dinar
which I will keep for repaying debts.” Then he said, “Those who are rich in this world would have
little reward in the Hereafter except those who spend their money here and there (in Allah’s Cause),
and they are few in number.” Then he ordered me to stay at my place and went not far away. I heard a
voice and intended to go to him but I remembered his order, “Stay at your place till I return.” On his
return I said, “O Allah’s Messenger (ﷺ)! (What was) that noise which I heard?” He said, “Did you hear
anything?” I said, “Yes.” He said, “Gabriel came and said to me, ‘Whoever amongst your followers
dies, worshipping none along with Allah, will enter Paradise.’ ” I said, “Even if he did such-and-such
things (i.e. even if he stole or committed illegal sexual intercourse)” He said, “Yes.”