Section 1 Mishkat al-Masabih 4188
Arabic hadith text
وَعَنِ ابْنِ عُمَرَ قَالَ: نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ يَقْرِنَ الرَّجُلُ بَيْنَ التَّمْرَتَيْنِ حَتَّى يستأذِنَ أَصْحَابه
Translation
Ibn ‘Umar said God’s messenger prohibited anyone taking two dates together before asking permission from his companions. (Bukhari and Muslim.)