Sunan an-Nasa'i, Hadith 5724 ⓘ
Abu Raja' said: "I asked Al-Hasan about At-Tila' (thickened grape juice) that has been reduced to half. He said: 'Do not drink it.'"
أَخْبَرَنَا سُوَيْدٌ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ يَزِيدَ بْنِ زُرَيْعٍ، قَالَ حَدَّثَنَا أَبُو رَجَاءٍ، قَالَ سَأَلْتُ الْحَسَنَ عَنِ الطِّلاَءِ الْمُنَصَّفِ، فَقَالَ لاَ تَشْرَبْهُ .
also referenced under: Book 51, Hadith 186 (In-Book) & Volume 6, Book 51, Hadith 5727 (DarusSalam)