Surah An-Nisa 4:112

وَمَن يَكْسِبْ خَطِيٓـَٔةً أَوْ إِثْمًا ثُمَّ يَرْمِ بِهِۦ بَرِيٓـًٔا فَقَدِ ٱحْتَمَلَ بُهْتَـٰنًا وَإِثْمًا مُّبِينًا

But whoever earns an offense or a sin and then blames it on an innocent [person] has taken upon himself a slander and manifest sin.

Translation: Saheeh International

Tafsir

And whoever commits a mistake a minor sin or a sin a grave sin and then casts it upon the innocent one who is innocent of it he has thereby burdened himself with calumny by his false accusation and a manifest sin one which is evident on account of what he has committed.

Excerpt from Tafsir al-Jalalayn, commentary on 4:112, via Quran.com. The reader has the full commentary and 9 more tafsirs.