Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:17456[Chain 1] Abū al-Ḥasan ʿAlī b. Aḥmad b. ʿAbdān > Aḥmad b. ʿUbayd al-Ṣaffār > Abū Muslim > Muslim [Chain 2] Abū ʿAbdullāh al-Ḥāfiẓ > Abū al-Naḍr al-Faqīh > Muḥammad b. Ayyūb > Muslim b. Ibrāhīm > Hishām > Yaḥyá > ʿAbdullāh b. Abū Qatādah from his father

[Machine] The Prophet ﷺ forbade combining dates and grapes in the same dish, and also combining dates and raisins, and he ordered that each one of them should be eaten separately.  

البيهقي:١٧٤٥٦أَخْبَرَنَا أَبُو الْحَسَنِ عَلِيُّ بْنُ أَحْمَدَ بْنِ عَبْدَانَ أنبأ أَحْمَدُ بْنُ عُبَيْدٍ الصَّفَّارُ ثنا أَبُو مُسْلِمٍ ثنا مُسْلِمٌ ح وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو النَّضْرِ الْفَقِيهُ ثنا مُحَمَّدُ بْنُ أَيُّوبَ أنبأ مُسْلِمُ بْنُ إِبْرَاهِيمَ ثنا هِشَامٌ ثنا يَحْيَى عَنْ عَبْدِ اللهِ بْنِ أَبِي قَتَادَةَ عَنْ أَبِيهِ

أَنَّ النَّبِيَّ ﷺ نَهَى أَنْ يُجْمَعَ بَيْنَ التَّمْرِ وَالزَّهْوِ وَبَيْنَ التَّمْرِ وَالزَّبِيبِ وَأَمَرَ أَنْ يُنْبَذَ كُلُّ وَاحِدٍ مِنْهَما عَلَى حِدَةٍ  

رَوَاهُ الْبُخَارِيُّ فِي الصَّحِيحِ عَنْ مُسْلِمِ بْنِ إِبْرَاهِيمَ

See similar narrations below:

Collected by Bukhārī
bukhari:5602Muslim > Hishām > Yaḥyá b. Abū Kathīr > ʿAbdullāh b. Abū Qatādah from his father

The Prophet ﷺ forbade the mixing of ripe and unripe dates and also the mixing of dates and raisins (for preparing a syrup) but the syrup of each kind of fruit should be prepared separately. ( One may have such drinks as long as it is fresh )  

البخاري:٥٦٠٢حَدَّثَنَا مُسْلِمٌ حَدَّثَنَا هِشَامٌ أَخْبَرَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَتَادَةَ عَنْ أَبِيهِ قَالَ

نَهَى النَّبِيُّ ﷺ أَنْ يُجْمَعَ بَيْنَ التَّمْرِ وَالزَّهْوِ وَالتَّمْرِ وَالزَّبِيبِ وَلْيُنْبَذْ كُلُّ وَاحِدٍ مِنْهُمَا عَلَى حِدَةٍ