This is a good and sound hadith.

2354 – Muhammad ibn al-Muthanna narrated to us, he said: Khalid ibn al-Harith narrated to us, from Humayd, from Anas, similar to it, and he did not raise it (to the Prophet). And this is more correct than the first hadith.

2355 – Qutaybah ibn Sa'id narrated to us: 'Abd al-'Aziz ibn Muhammad narrated to us, from 'Amr ibn Abi 'Amr. And 'Ali ibn Hujr narrated to us: Isma'il ibn Ja'far informed us, from 'Amr ibn Abi 'Amr, from 'Abd Allah — who is Ibn 'Abd al-Rahman — al-Ansari al-Ash'hali, from Hudhayfah ibn al-Yaman, who said: The Messenger of Allah, peace and blessings be upon him, said: "The Hour will not come to pass until the most fortunate of people in this world is Luka' ibn Luka' (a base man, son of a base man)."

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And "Sahih Ibn Hibban" (6848) and (6849).

His saying: "until it is not said on earth: Allah, Allah" means: there will remain no Muslim on earth who says: "There is no god but Allah," as is explained in the narration of Ibn Hibban (6848).

And whoever among the later scholars inferred from this hadith the legitimacy of dhikr using the single name (Allah alone) has erred, because that was not legislated in the Book nor the Sunnah, nor is it transmitted from the predecessors of this Ummah. And dhikr is a type of worship, so there is no room for personal opinion in it. And because dhikr is praise of Allah, Glorified be He, and it is only done with a complete sentence upon which it is proper to stop, such as: "There is no god but Allah," and such as: "Glory be to Allah and praise be to Allah," and such as: "There is no might and no power except with Allah," and whatever is of this kind from the transmitted remembrances from him, peace and blessings be upon him. The single name alone is not proper to stop upon, nor is it a complete sentence, nor is it meaningful speech, as is known to the people of the Arabic language.

(1) In the printed edition after this: "A chapter on that," and it is not in our manuscript sources.

(2) Hasan due to others, and Ahmad recorded it in "Al-Musnad" (23303). =