You have mentioned that Rasulullah(Sallallaahu Alayhi Wassallam), when he used to enter the toilet, he used to say ,Allaahumma innee a’oodhu bika minal khubuth wal khabaaith’. What he used say when he is coming out of the toilet? Let me know so we can follow.
Rasulullah (Sallallaahu Alayhi Wasallam) used to say, ‘Ghufraanaka’.
According to Sirbawi (RA), a renowned authority in Arabic linguistic means
‘O Allah I am grateful to you.’
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai