Musnad Ahmad 648
Musnad 'Ali Ibn Abi Talib
It was narrated from `Abdullah bin Nujayy from his father that He travelled with ‘Ali (رضي الله عنه) - he was the one who carried his vessel for wudoo’. When he reached Neenawa on his way to Siffeen, ‘Ali (رضي الله عنه) called out: Be patient, Abu `Abdullah; be patient, Abu ‘Abdullah, on the banks of the Euphrates. I said: what did he say? He said: I entered upon the Prophet (ﷺ) one day and his eyes were flowing with tears. I said: O Prophet (ﷺ) of Allah, has someone upset you? Why are your eyes flowing with tears? He said: `No, but Jibreel left me a while ago. He told me that al-Husain would be killed on the banks of the Euphrates, And he said: `Would you like to smell his dust (the dust of the land where he will fall)?` I said: Yes. He stretched out his hand and picked up a handful of dust and gave it to me, and I could not help but weep.`