Sa'id bin Jubayr said: "And the one who took upon himself the greater part of it" [Surah An-Nur: 11], meaning the major part of it, "from among them" [Surah An-Nur: 11], meaning from among the accusers, and he is Ibn Ubayy, the chief of the hypocrites; he is the one who said: Neither am I free of her, nor is she free of me. "Will have a great punishment" [Surah An-Nur: 11]. In this verse there is a lesson for all Muslims: if one of them commits a wrong and someone helps him in it by deed or word, or alludes to it, or is pleased by it or approves of it, then he shares in that wrong in proportion to the part he took. And if a wrong occurs among the Muslims, whoever is present and dislikes it is like one who was absent, and whoever is absent and approves of it is like one who was present.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19488