Q: Is the attribute of (the Self) of Allah an attribute of Divine Essence?
A: This is true, Allah (Glorified be He) says about `Isa (Jesus) (peace be upon him) that he said: “You know what is in my inner-self though I do not know what is in Yours” i.e. the “Self of Allah”.
 Surah Al-Ma’idah, 5: 116
Source : Fatwas of Ibn Baz – alifta.net