مختصر صحيح بخاري
Mukhtasar Sahih Bukhari
Book of Funerals
Punishment for one who commits suicide
Narrated by Sayyiduna Jundub (may Allah be pleased with him) from the Noble Prophet (peace and blessings of Allah be upon him) that he said: "A man received some wounds, so he killed himself. Allah the Exalted said: 'My servant has hastened before Me (i.e., he took his own life), therefore I have made Paradise forbidden for him.'"