Yusuf • BN-TAFSEER-IBN-E-KASEER
﴿ وَإِن كَانَ قَمِيصُهُۥ قُدَّ مِن دُبُرٍۢ فَكَذَبَتْ وَهُوَ مِنَ ٱلصَّٰدِقِينَ ﴾
“but if his tunic has been torn from behind, then she is lying, and he is speaking the truth."”
Please check ayah 12:29 for complete tafsir.