Chapter on Conditions and Options in Sales
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 8
وَ رَوَى إِسْحَاقُ بْنُ عَمَّارٍ عَنِ اَلْعَبْدِ اَلصَّالِحِ عَلَيْهِ اَلسَّلاَمُ قَالَ: "مَنِ اِشْتَرَى بَيْعاً وَ مَضَتْ ثَلاَثَةُ أَيَّامٍ وَ لَمْ يَجِئْ فَلاَ بَيْعَ لَهُ ".
Ishaq ibn Ammar narrated from the Righteous Servant of Allah سبحانه وتعالى (Imam Musa ibn Jafar Al-Kadhim عليه السلام) who said: "Whoever buys an item, and three days pass without him coming (to confirm or claim it), then the sale is void."
- Ṣaḥīḥ al-Faqīh, p. 218