Al-Kāfi
Hadith 4732- يُونُسُ عَنْ أَبِي ثَابِتٍ وَابْنِ عَوْنٍ عَنْ مُعَاوِيَةَ بْنِ وَهْبٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) فِي رَجُلٍ كَانَ لَهُ عَلَى رَجُلٍ حَقٌّ فَفَقَدَهُ وَلا يَدْرِي أَيْنَ يَطْلُبُهُ وَلا يَدْرِي أَحَيٌّ هُوَ أَمْ مَيِّتٌ وَلا يَعْرِفُ لَهُ وَارِثاً وَلا نَسَباً وَلا بَلَداً قَالَ اطْلُبْ قَالَ إِنَّ ذَلِكَ قَدْ طَالَ فَأَتَصَدَّقُ بِهِ قَالَ اطْلُبْهُ.
2. Yunus ibn Thabit and ibn ‘Awn has narrated from Mu‘awiyah ibn Wahab who has narrated the following: “This is about the case of a man who has a right on another man. However, he was lost and he did not know where to look for him, not knowing if he is dead or living. He does not know of anyone as his heir, or a town or lineage relation. He (the Imam) said, ‘He must search but if it becomes very long then he must give it in charity.’ He (the Imam) said, ‘You must search for him.’”