The Prophet ﷺ said, "Whoever swallows poison and kills himself will have his poison in his hand, sipping it in the fire of Hell, abiding there forever."
عن النبي ﷺ قال: من تحسى سما فقتل نفسه فسمه في يده، يتحساه في نار جهنم خالدا فيها أبدا.
Bukhari narrated it in the Book of Medicine (5778), and Muslim in the Book of Faith (109:175), both through Khalid bin Harith, who said, Shubah narrated to us, from Sulayman, who said, I heard Zakwan narrating from Abu Hurairah, and he mentioned it within a longer hadith.