As for ʿAbd al-Karim ibn Muhammad al-Lakhmi, al-Bukhari included his biographical entry in al-Tarikh, as did Ibn Hibban in his book al-Thiqat (7/131), and Ibn ʿAsakir as well—but only through the narration of this Sulayman ibn ʿAbd al-Rahman. He is therefore unknown.
In sum, the hadith is authentic, for most of its routes do not establish an intermediary between ʿUrwah ibn Ruwaym and Anas—particularly since the first chain is authentic. Al-Haythami said in Majmaʿ al-Zawaʾid (10/55):
“Ahmad narrated it, and its narrators are those of the authentic collections, apart from ʿUrwah ibn Ruwaym; and he is trustworthy.”
I then came across another variation in this route. Al-Tabarani said in al-Muʿjam al-Kabir (22/342/857) and Musnad al-Shamiyyin (1/299/522): Ahmad ibn Khulayḍ al-Halabi narrated to us: Abu Tawbah al-Rabiʿ ibn Nafiʿ narrated to us: Muhammad ibn Muhajir narrated to us, from ʿUrwah ibn Ruwaym, from Abu Kabshah al-Anmari, who said:
“We went out with the Messenger of Allah, peace and blessings be upon him, on one of his military expeditions. He stopped at a place, and we came to him there. He raised his hands and said ...” Then he mentioned it.
I say: This too is authentic. Its narrators are trustworthy and are among those included in al-Tahdhib, apart from Ahmad ibn Khulayḍ, who was al-Kindi. A number of hadith masters narrated from him, and al-Dhahabi said in his biographical entry in al-Siyar (13/489):
“I know of no fault in him.”
As for his statement, “from Abu Kabshah al-Anmari”: if he preserved it accurately, it does not harm the chain, since it is transmission from one Companion to another. And Allah knows best.
ʿAbd al-Razzaq narrated from Maʿmar, from Qatadah, who said: The Messenger of Allah, peace and blessings be upon him, said: