Hadis Sambhar — Hadith #38193

Allah's Messenger (may peace be upon him) said, "That which surely joins a believer after his death from his deeds and good deeds is the knowledge he taught or the noble children he died leaving behind, or the Qur'an." Sharif which he left as Miras, or Mosque which he built himself, or Musafirkhana which he built for the convenience of travelers, or water canals which he made to flow (for irrigation, etc.), or Sadaqah which he took from his wealth. The reward of these deeds will come to him even after his death.” (Ibn Majah 242, Baihakbir Shuabul Iman 3448, Ibn Khuzaimah 2490 with different words, Sahih Targhib 107)