عَنْهُ أَيْضًا أَنَّ أَبَا بَكْرٍ رَضِيَ اللَّهُ عَنْهُ أَقْسَمَ عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ لَهُ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ لَا تُقْسِمْ
It is also narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that Sayyiduna Abu Bakr (may Allah be pleased with him) swore an oath by the Prophet Muhammad (peace and blessings be upon him), but he (peace and blessings be upon him) said to him: Do not swear an oath.