Nahj al-Balāgha
Hadith 1200بَلَغَنِي أَنَّكَ ابْتَعْتَ دَاراً بِثَمانِينَ دِينَاراً، وَكَتَبْتَ لَهَا كِتَاباً، وَأَشْهَدْتَ فِيهِ شُهُوداً؟
I have come to know that you have purchased a house for eighty Dinars, and that you have written a document for it and put witnessing on it?