Bukhari Vol. 1 : No. 144

Narrated Anas (Radi-Allahu 'anhu):

Whenever the Prophet (Sallallahu 'Alaihi Wa Sallam) went to answer the call
of nature, he used to say, "Allah-umma inni a'udhu bika minal khubuthi wal
khaba'ith i.e. O Allah, I seek Refuge with You from all offensive and
wicked things (evil deeds and evil spirits)."

Bukhari Vol. 1 : No. 144

Narrated 'Aisha (Radi-Allahu 'anha):

The Prophet (Sallallahu 'Alaihi Wa Sallam) used to like to start from the
right side on wearing shoes, combing his hair and cleaning or washing
himself and on doing anything else.

Bukhari Vol. 1 : No. 169