Hadith 59
It is reported on the authority of Abu Hurairah (RA) that the Messenger of Allah (ﷺ) (may peace and blessings of Allah be upon him) made observations like them embodied in the hadith narrated by Yahya bin Muhammad on the authority of 'Ala', and added to it: even if he observed fast and prayed and asserted that he was a Muslim.
Hadith 2862
This hadith has been transmitted on the authority of Ibn 'Umar but with a slight variation of wording (and the words are):" One of them would be completely submerged in perspiration up to half of his ears."