Man Lā Yaḥḍuruh al-Faqīh
Hadith 6333750 - وَ رَوَى وَهْبُ بْنُ وَهْبٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَلَيْهِ اَلسَّلاَمُ أَنَّ عَلِيّاً عَلَيْهِ اَلسَّلاَمُ كَانَ يَقُولُ : "لاَ يَجُوزُ اَلْعَرَبُونُ إِلاَّ أَنْ يَكُونَ نَقْداً مِنَ اَلثَّمَنِ".
Hadith.3750 - Wahb ibn Wahb narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) from his father, Imam Muhammad ibn Ali Al-Baqir (as) (peace be upon them), that Imam Ali ibn Abi Talib (as) used to say:
"Earnest money (down payment) is not permissible unless it is part of the price."