It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever guarantees me what is between his two jaws (that is, the tongue) and what is between his two legs (that is, the private parts), I guarantee Paradise for him."
Hadith Referenceمسند أبي يعلى الموصلي / مسند جابر / 2109
Hadith Takhrij«قال سعيد بن محمد السناري: صحيح: مضى [برقم 1855]، ف» «أخرجه مجمع الزوائد ومنبع الفوائد برقم: 18162، مسند ابویعلیٰ ترقیم الاثری: 2105»