"The Messenger of Allah ﷺ prohibited taking two dates at a time until seeking permission from one's companion." He said: There is something on this topic from Sa'd the freed slave of Abu Bakr.  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يَقْرِنَ بَيْنَ التَّمْرَتَيْنِ حَتَّى يَسْتَأْذِنَ صَاحِبَهُ قَالَ وَفِي الْبَابِ عَنْ سَعْدٍ مَوْلَى أَبِي بَكْرٍ