Riyad as-Salihin, Book 16, Hadith 1436 (In-Book) ⓘ
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah said, "The Mufarridun have gone ahead." He was asked, "Who are the Mufarridun?" He replied, "Those men and women who frequently celebrate the remembrance of Allah."[Muslim].
وعنه قال: قال رسول الله صلى الله عليه وسلم: "سبق المفردون" قالوا: وما المفردون يا رسول الله؟ قال: "الذاكرون الله كثيرًا والذكرات" ((رواه مسلم)).