Sunan At-Tirmidhi

Narrated 'Abdullah bin Buraidah:from his father that the Prophet (ﷺ) said: ""Do you know what the parable of this and this is?"" - and he tossed two pebbles. They said: ""Allah and His Messenger (ﷺ) know better."" He said: ""This (the farther) one is hope, and this (closer) one is death