Riyad as-Salihin, Book 1, Hadith 535 (In-Book) ⓘ
Thauban (May Allah be pleased with him) reported: Messenger of Allah said, "He who guarantees me that he will not beg anything from anyone, I will guarantee him (to enter) Jannah." I said, "I give you the guarantee." Then Thauban (May Allah be pleased with him) never begged anything from anyone.[Abu Dawud].
وعن ثوبان رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "من تكفل لي أن لا يسأل الناس شيئاً، وأتكفل له الجنة؟" فقلت: أنا؛ فكان لا يسأل أحداً شيئاً، ((رواه أبو داود بإسناد صحيح)).