Musnad Ahmad Hadith 17858

It is narrated from Harith bin Aqeesh (may Allah be pleased with him) that once we were with Abu Barzah (may Allah be pleased with him) at night. He narrated a hadith from the Prophet (ﷺ), saying: "If four minor children of two Muslims (husband and wife) die, Allah will, by His grace and mercy, admit them into Paradise." The companions (may Allah be pleased with them) asked, "O Messenger of Allah! (ﷺ) What if there are three children?" The Prophet (ﷺ) replied, "The same ruling applies." The companions (may Allah be pleased with them) asked, "What if there are two children?" He replied, "The same ruling applies." And there will be a man in my Ummah for whom the Fire will be spread out so much that he will become one of its corners, and there will be a man in my Ummah by whose intercession as many people as the tribe of Mudar will enter Paradise.