Riyad as-Salihin: The Book of the Etiquette of Sleeping, Lying and Sitting etc – Hadith No. 157 — Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (ﷺ)… (Hadith No. 157)

Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (ﷺ) said, "If anyone sits in a gathering where he does not remember Allah, he will bring grief upon himself (on the Day of Resurrection), and he who lies down in a place where he does not remember Allah, will bring grief upon himself (on the Day of Resurrection).".

Explanation:

Reference: Riyad as-Salihin, The Book of the Etiquette of Sleeping, Lying and Sitting etc, Hadith No. 157