Mawdoo`(Fabricated) Hadeeth: No: 11 "The One who knows himself, knows his Lord"

As-Sakhaawee said, "Abu al-Mudhaffar as-Sama’aanee said, ‘this is not known as a hadeeth of the Messenger , rather it is only related as a saying of Yahya bin Mu’aadh ar-Raazee.’ And likewise an-Nawawee said, ‘it is not established’" [‘al-Maqaasid al-Hasanah’ (pg. 491 no.1149)]

As-Suyutee said, "this hadeeth is not authentic" [‘Haawee lil Fataawee’ (2/351)]

Alee al-Qaaree quoted from ibn Taymiyyah saying, "fabricated" [‘al-Asraar al-Marfoo’ah’ (pg. 83)]

Al-Allaamaa Fairozabaadee said, "this is not from the Prophetic ahaadeeth, despite the fact that the majority of people make it so, and it is not authentic at all. It is only related from the Jewish traditions as ‘O mankind! Know yourself and you will know your Lord’" [‘ar-Radd alaa al-Mu’tarideen’ (2/37)]

Al-Albaanee says, "it has no basis" [‘Silsilah ad-Da’eefah’ (1/165 no.66)]