It has also been reported at length from Abu al-Siddiq by some unknown narrators, so it belongs in the other book (1588).
712 — “Rejoice, and convey glad tidings to those behind you: whoever sincerely testifies that there is no deity worthy of worship except Allah will enter Paradise.”
Ahmad (4/402, 411) recorded it through two chains from Hammad ibn Salamah, who said: Abu Imran al-Jawni narrated to us from Abu Bakr ibn Abu Musa, from his father, who said: “I came to the Prophet, peace and blessings be upon him, accompanied by a group from my people. He said”—and then mentioned the above report. “We left the Prophet, peace and blessings be upon him, to give the people glad tidings, but Umar ibn al-Khattab met us and took us back to the Messenger of Allah, peace and blessings be upon him. The Messenger of Allah, peace and blessings be upon him, asked, ‘Who turned you back?’ They replied, ‘Umar.’ He said, ‘Why did you turn them back, Umar?’ Umar replied, ‘Then people will merely rely on it.’ The Messenger of Allah, peace and blessings be upon him, then fell silent.”
I say: This is an authentic chain of transmission meeting Muslim’s criteria. Abu Imran al-Jawni’s name was Abd al-Malik ibn Habib al-Azdi. As for Abu Bakr ibn Abu Musa, they did not mention a name for him.
Al-Nasa’i—perhaps in al-Kubra—also reported, from Sahl ibn Hunayf and Zayd ibn Khalid al-Juhani, a report attributed to the Prophet with the wording: “Give the people glad tidings that whoever says, ‘There is no deity worthy of worship except Allah alone, having no partner,’ Paradise becomes assured for him.” It is cited in al-Majma‘ (1/18) from al-Tabarani’s al-Kabir, on the authority of Zayd ibn Khalid, and he said: “Its narrators have been declared trustworthy.”