It was narrated from Ibn 'Umar that: Nabidh of raisins would be made for him in a water skin in the morning, and he would drink it that night, and it would be made for him in the evening, and he would drink it in the morning. He would wash out the water skins and not leave any pieces or anything in them. Nafi' said: "We used to drink it like honey."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا سُوَيْدٌ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ كَانَ يُنْبَذُ لَهُ فِي سِقَاءِ الزَّبِيبِ غُدْوَةً فَيَشْرَبُهُ مِنَ اللَّيْلِ وَيُنْبَذُ لَهُ عَشِيَّةً فَيَشْرَبُهُ غُدْوَةً وَكَانَ يَغْسِلُ الأَسْقِيَةَ وَلاَ يَجْعَلُ فِيهَا دُرْدِيًّا وَلاَ شَيْئًا . قَالَ نَافِعٌ فَكُنَّا نَشْرَبُهُ مِثْلَ الْعَسَلِ .
sunnah.com