21- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ عَبْدِ اللهِ بْنِ الْمُغِيرَةِ عَنْ عَبْدِ اللهِ بْنِ سِنَانٍ قَالَ
سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنْ شِرَاءِ الذَّهَبِ فِيهِ الْفِضَّةُ وَالزِّيْبَقُ وَالتُّرَابُ بِالدَّنَانِيرِ وَالْوَرِقِ فَقَالَ لا تُصَارِفْهُ إِلا بِالْوَرِقِ قَالَ وَسَأَلْتُهُ عَنْ شِرَاءِ الْفِضَّةِ فِيهَا الرَّصَاصُ وَالْوَرِقُ إِذَا خَلَصَتْ نَقَصَتْ مِنْ كُلِّ عَشَرَةٍ دِرْهَمَيْنِ أَوْ ثَلاثَةً قَالَ لا يَصْلُحُ إِلا بِالذَّهَبِ.
21. Ali ibn Ibrahim has narrated from his father from ‘Abd Allah ibn al-Mughirah from ‘Abd Allah ibn Sinan who has said the following:
“This is concerning my question before abu ‘Abd Allah 
, about buying gold in which there was silver, mercury and soil in exchange for dinars and wariq (dirham). He (the Imam) said, ‘You must not change except with wariq (dirham).’ I then asked him (the Imam) about buying silver in which there was lead and wariq (dirham). If it was pure it was reduced by two or three dirhams of each ten. He (the Imam) said, ‘It is not valid except for gold.’”
