It was narrated that Ibn 'Umar said: "The Messenger of Allah (ﷺ) 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."'
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا الْفَضْلُ بْنُ سَهْلٍ، قَالَ حَدَّثَنَا أَبُو النَّضْرِ، هَاشِمُ بْنُ الْقَاسِمِ قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ بْنِ أَبِي سَلَمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ الَّذِي لاَ يُؤَدِّي زَكَاةَ مَالِهِ يُخَيَّلُ إِلَيْهِ مَالُهُ يَوْمَ الْقِيَامَةِ شُجَاعًا أَقْرَعَ لَهُ زَبِيبَتَانِ - قَالَ - فَيَلْتَزِمُهُ أَوْ يُطَوِّقُهُ - قَالَ - يَقُولُ أَنَا كَنْزُكَ أَنَا كَنْزُكَ " .
sunnah.com