قَالَ غُلَامٌ لِأَبِي عَبْدِ اللَّهِ ع إِنِّي كُنْتُ قُلْتُ لِمَوْلَايَ بِعْنِي بِسَبْعِمِائَةِ دِرْهَمٍ وَ أَنَا أُعْطِيكَ ثَلَاثَمِائَةِ دِرْهَمٍ فَقَالَ لَهُ أَبُو عَبْدِ اللَّهِ ع إِنْ كَانَ لَكَ يَوْمَ شَرَطْتَ أَنْ تُعْطِيَهُ شَيْءٌ فَعَلَيْكَ أَنْ تُعْطِيَهُ وَ إِنْ لَمْ يَكُنْ لَكَ يَوْمَئِذٍ شَيْءٌ فَلَيْسَ عَلَيْكَ شَيْءٌ.
‘I had said to my master, “Sell me for seven hundred dirham, I pay you three hundred dirham.’” Abu ‘Abd Allah (a.s.), said, ‘If you owned something on the day you made the condition then you must pay, and if you did not have anything on that day, there is nothing on you.’”