Surah Yusuf, ayah 18

12:18

وَجَآءُو عَلَىٰ قَمِيصِهِۦ بِدَمٖ كَذِبٖۚ قَالَ بَلۡ سَوَّلَتۡ لَكُمۡ أَنفُسُكُمۡ أَمۡرٗاۖ فَصَبۡرٞ جَمِيلٞۖ وَٱللَّهُ ٱلۡمُسۡتَعَانُ عَلَىٰ مَا تَصِفُونَ ١٨

Wajā'ū 'alā qamīsihī bidamin kadhibin qāla bal sawwalat lakum anfusukum amran fasabrun jamīlun wallāhul-musta'ānu 'alā mā tasifūn

And they brought upon his shirt false blood.588 [Jacob] said, "Rather, your souls have enticed you to something, so patience is most fitting. And Allāh is the one sought for help against that which you describe."

Footnotes

588 They had stained Joseph's shirt with the blood of a lamb but had forgotten to tear it, thereby arousing their father's suspicion.