Al-Kāfi - Volume 7 > Inheritance of One who is Lost
Hadith #5

5- يُونُسُ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ قَالَ لِي أَبُو الْحَسَنِ (عَلَيْهِ السَّلام) الْمَفْقُودُ يُتَرَبَّصُ بِمَالِهِ أَرْبَعَ سِنِينَ ثُمَّ يُقْسَمُ.

5. Yunus has narrated from Ishaq ibn ‘Ammar who has narrated the following: “Abu al-Hassan, ‘Alayhi al-Salam, said to me, ‘The assets of a lost person must be kept for four years; then they are distributed.’”