Musnad Abu Ya'la al-Mawsili 154:81

Ya'qub ibn Ibrahim al-'Abdi narrated to us, Abu 'Asim narrated to us, from 'Abd al-Hamid ibn Ja'far, he said: My father narrated to me, from Sa'id ibn 'Umayr al-Ansari, he said: I sat with 'Abdullah ibn 'Umar and Abu Sa'id al-Khudri. One of them said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "The sweat will reach the people on the Day of Resurrection." One of them said: "Meaning, up to the earlobe." And the other said: "Up to where it bridles him." Ibn 'Umar said: "Like this," and Abu 'Asim described it, so he moved his finger from his earlobe to his mouth. This and that are the same.