Jabir b. Samura was asked about the old age of Allah's Apostle (ﷺ). He said:When he oiled his head nothing was seen (as a mark of old age) and when he did not apply oil something (of the old age) became visible

Jabir b. Samura reported that there had appeared some whiteness on the front part of the head and beard of Allah's Messenger (ﷺ). When he applied oil, it did not become visible, but when he did not (apply) oil, it became apparent. And he had a thick beard. A person said:His face was as (bright) as the sword. Thereupon he (Jabir) said: No, it was round and like the sun and the moon. And I saw the seal near his shoulder of the size of a pigeon's egg and its color was the same as that of his body

Jabir. Samura reported:I saw the seal on his back as if it were a pigeon's egg

This hadith has been narrated on the authority of Simak with the same chain of transmitters