"The Messenger of Allah said: The one who does not pay Zakah on his wealth, his wealth will appear to him on the Day of Resurrection like a bald-headed Shuja 'a [2] with two dots above its eyes. It will hold onto him or encircle him and will say: I am your hoarded treasure, I am your hoarded treasure."' (Using translation from Nasāʾī 2481)
"إِنَّ الَّذى لَا يُؤَدَّى زكَاةَ مَالِه يُخَيَّلُ إِلَيْه مَالُهُ يَوْمَ الْقِيَامَة شُجَاعًا أَقْرَعَ لَهُ زَبِيبَتَانِ فَيَلْزَمُهَ، أوْ يُطَوِّقُهُ يَقولُ: أَنَا كنْزُكَ، أَنَا كَنْزُكَ ".