قُلْتُ لَهُ رَجُلٌ اشْتَرَى زِقَّ زَيْتٍ فَوَجَدَ فِيهِ دُرْدِيّاً قَالَ فَقَالَ إِنْ كَانَ يَعْلَمُ أَنَّ ذَلِكَ فِي الزَّيْتِ لَمْ يَرُدَّهُ وَ إِنْ لَمْ يَكُنْ يَعْلَمُ أَنَّ ذَلِكَ فِي الزَّيْتِ رَدَّهُ عَلَى صَاحِبِهِ.
“This is concerning my question before Abu‘ Abd Allah (a.s.), about the case of a man who bought a skin sack of oil and found residue in it. He (the Imam) said, If he knew that the oil had such things in it, he cannot return; but if he did not know that the oil had such things in it he can return it to the owner.”’