In the sellers' agreement, there is no separation.
بَابُ: فِي الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا
Sunan ad-Darimi, Book of Transactions(view book)
Saʿīd b. ʿĀmir > Saʿīd > Qatādah > Ṣāliḥ Abū al-Khalīl > ʿAbdullāh b. al-Ḥārith > Ḥakīm b. Ḥizām
The Messenger of Allah said: "The two parties to a transaction have the choice so long as they have not separated. If they are honest and open, their transaction will be blessed, but if they tell lies and conceal anything the blessing of their transaction will be lost."
أَخْبَرَنَا سَعِيدُ بْنُ عَامِرٍ عَنْ سَعِيدٍ عَنْ قَتَادَةَ عَنْ صَالِحٍ أَبِي الْخَلِيلِ عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ عَنْ حَكِيمِ بْنِ حِزَامٍ
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا فَإِنْ صَدَقَا وَبَيَّنَا بُورِكَ لَهُمَا فِي بَيْعِهِمَا وَإِنْ كَذَبَا وَكَتَمَا مُحِقَ بَرَكَةُ بَيْعِهِمَا»
Classification
Abū al-Walīd > Shuʿbah
About Qatadah with his chain of narration, similar to it. – Weak Chain
أَخْبَرَنَا أَبُو الْوَلِيدِ حَدَّثَنَا شُعْبَةُ
عَنْ قَتَادَةَ بِإِسْنَادِهِ مِثْلَهُ – إسناده ضعيف