The Prophet ﷺ said: If anyone spends the night with grease on his hand which he has not washed away, he can blame only himself if some trouble comes to him.  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ نَامَ وَفِي يَدِهِ غَمَرٌ وَلَمْ يَغْسِلْهُ فَأَصَابَهُ شَىْءٌ فَلاَ يَلُومَنَّ إِلاَّ نَفْسَهُ