Abu Harb bin Zayd bin Khalid al-Juhani (may Allah have mercy on him) narrates from his father, Sayyiduna Zayd bin Khalid al-Juhani (may Allah be pleased with him), that he said: "The Messenger of Allah (peace and blessings be upon him) sent me with this message: 'Give the people the glad tidings that whoever says "La ilaha illallahu wahdahu la sharika lahu" (there is none worthy of worship except Allah, He is One, He has no partner) will enter Paradise.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Harb bin Zayd bin Khalid except Bukayr bin Abdullah (may Allah have mercy on him), and no one from Bukayr (may Allah have mercy on him) except his son Makhramah (may Allah have mercy on him), while Qudamah bin Muhammad al-Ashja'i (may Allah have mercy on him) is alone in transmitting it."
Hadith Referenceالمعجم الأوسط / باب الميم / 6472
Hadith Takhrij«أخرجه النسائي فى «السنن الكبرى» برقم: 10883، 10884، والطبراني فى «الكبير» برقم: 5262»