Surah An-Nisa — Ayah 112 (4:112)
وَمَن يَكۡسِبۡ خَطِيٓـَٔةً أَوۡ إِثۡمٗا ثُمَّ يَرۡمِ بِهِۦ بَرِيٓـٔٗا فَقَدِ ٱحۡتَمَلَ بُهۡتَٰنٗا وَإِثۡمٗا مُّبِينٗا ١١٢
English translation (Saheeh International)
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.
Brief commentary
If a person does a wrong action unintentionally or a sin intentionally and then accuses an innocent person of the same, they have taken on themselves a serious lie and a clear sin by acting in that manner.