The Messenger of Allah ﷺ said, "Gatherings are held in trust, except for three: a gathering in which forbidden blood is shed, a gathering in which a forbidden private part is made lawful, and a gathering in which wealth is taken unlawfully."
حدثنا سريج بن النعمان حدثنا عبد الله بن نافع عن ابن أبي ذئب عن ابن أخي جابر بن عبد الله
قال رسول الله ﷺ المجالس بالأمانة إلا ثلاثة مجالس مجلس يسفك فيه دم حرام ومجلس يستحل فيه فرج حرام ومجلس يستحل فيه مال من غير حق
Its isnad is daif because of Abdullah bin Nafi and the nephew of Jabir, the former having been graded weak by the critics, and the latter being unknown.Abu Dawud narrated it in 4/269, number 4879, with its wording and chain, as did Bayhaqi in 10/247.