"Ali, may Allah be pleased with him, used to give the people thickened grape juice into which flies would fall and not be able to get out again." (Using translation from Nasāʾī 5718)
«كَانَ عَلِيٌّ يَرْزُقُ النَّاسَ طِلَاءً يَقَعُ فِيهِ الذُّبَابُ فَلَا يَسْتَطِيعُ أَنْ يَخْرُجَ مِنْهُ»