And this Idrīs is an unknown narrator, as stated in al-Taqrīb.

It has a corroborating report from Anas ibn Mālik, attributed directly to the Prophet ﷺ, with the wording:

“Sidrat al-Muntahā was shown to me in the seventh heaven; its fruit resembled the large clay jars of Hajar, and its leaves were like the ears of elephants. From its trunk issue two visible rivers and two hidden ones. I asked, ‘O Jibrīl, what are these?’ He said, ‘The hidden ones are in Paradise, while the visible ones are the Nile and the Euphrates.’”

112 – “Sidrat al-Muntahā was shown to me in the seventh heaven; its fruit resembled the large clay jars of Hajar and its leaves were like the ears of elephants. From its trunk issue two visible rivers and two hidden ones. I asked, ‘O Jibrīl, what are these?’ He replied, ‘The hidden ones are in Paradise and the visible ones are the Nile and the Euphrates.’”

Aḥmad narrated it (3/164): “ʿAbd al-Razzāq told us; Maʿmar narrated to us from Qatādah, from Anas ibn Mālik,” attributing it directly to the Prophet ﷺ.

I say: This chain is authentic according to the criteria of the Two Shaykhs. Al-Bukhārī also recorded it in suspended form (334), saying, “Ibrāhīm ibn Ṭahmān related it from Shuʿbah, from Qatādah” with this wording. He later connected the chain himself (3/30–33), and it is likewise found in Muslim (1/103–105), Abū ʿAwānah (1/120–124), al-Nasāʾī (1/76–77), and again in Aḥmad (4/207–208, 208–210) through several routes from Qatādah, from Anas, from Mālik ibn Ṣaʿṣaʿah within the lengthy ḥadīth of the Night Journey, where these words appear. Accordingly, they counted it as part of the narrations of Mālik ibn Ṣaʿṣaʿah, and that is correct.

I later found that al-Ḥākim also recorded it (1/81) through Aḥmad’s route, commenting, “Authentic according to the criteria of the Two Shaykhs,” and al-Dhahabī agreed with him. He likewise transmitted it through the route of Ḥafṣ ibn ʿAbd Allāh, who said: “Ibrāhīm ibn Ṭahmān narrated it to us,” with the same wording.