The Prophet ﷺ said, "I saw Isa, Musa, and Ibrahim. As for Isa, he was reddish, with curly hair and a broad chest. As for Musa, he was dark-skinned, large in build, and straight-haired, as if he were one of the men of Zutt."
قال النبي ﷺ: رأيت عيسى وموسى وإبراهيم فأما عيسى فأحمر جعد عريض الصدر، وأما موسى فآدم جسيم سبط كأنه من رجال الرط.
Bukhari narrated it in the Hadiths of the Prophets (3438) from Muhammad bin Kathir, [who said] Israel told us, [who said] Uthman bin Mughira told us, from Mujahid, from Ibn Abbas, who said, then he mentioned it as previously stated. This is the sahih view, that it belongs among the reports of Ibn Abbas, and the transmitters of Bukhari erred by attributing it to Ibn Umar.Ibn Hajar said, This is how it occurs in all the narrations that have reached us from the copies of Bukhari's book (that is, attributed to Ibn Umar). Abu Dharr took issue with this in his narration, saying, This is how it occurs in all the narrations heard from Firabri, Mujahid from Ibn Umar. He said, I do not know whether Bukhari narrated it this way or whether Firabri erred in it, for I have seen it in every route from Muhammad bin Kathir and others, from Mujahid, from Ibn Abbas.I say, more than one narrator reported it from Muhammad bin Kathir as belonging to Ibn Abbas, and likewise the other companions of Israel narrated it, among them Yahya bin Abu Zaida, Ishaq bin Mansur, Nadr bin Shumayl, and Adam bin Abu Iyas and others, all of them narrating from Israel with mention of Ibn Abbas.Among the evidence that the mistake did not come from Bukhari is that Ismaili narrated it through the route of Nasr bin Ali, from Abu Ahmad Zubayri, from Israel, and said in it, Ibn Abbas, without pointing out that Bukhari had said Ibn Umar. Had it occurred to him that way, he would have pointed it out, as was his habit. This is further supported by Bukhari's narrating the report of Ibn Awn, from Mujahid, from Ibn Abbas, in Hajj (1555).Among what favors the view that the hadith belongs to Ibn Abbas rather than Ibn Umar is that Ibn Umar used to object to anyone who claimed that Isa was red-haired, and he would swear against it. Yet in this narration of Mujahid it says, "As for Isa, he was red-haired and curly-haired." This supports the conclusion that the hadith belongs to Mujahid from Ibn Abbas, not from Ibn Umar. Allah knows best.See part of it in Fath al-Bari (6/484-485), and Tuhfat Ashraf (222/5).His saying, "sturdy," means strong of body, neither obese nor conspicuously thin, but rather a build in between the two.His saying, "like the Zutt," means tall but not thick, so he was neither lean and skinny, nor excessively and extremely tall. Other explanations have been given, but this is the most fitting description of him.