‘Abdur-Razzaaq ibn Hammaam said:

((Any knowledge which cannot accompany its holder/possessor to the toilet is not considered knowledge))

al-Hifth – Ahammiyyatuhu, ‘Ajaa.ibuhu, Tareeqatuhu, Asbaabuhu – Page 8

al-Jaami’ lil-Khateeb – Volume 2, Page 250

Note: This statement indicates that only that which is memorised is considered knowledge.

Ref: Fatwa-Online

Shaykh Muhammad ibn Saalih al-Uthaymeen said:

"So he does not backbite the people. He does not lie. He does not cause dissension or discord between people (by carrying tales) nor does he sell anything that is Haraam. So he stays away from all of the prohibitions."

Ref: Prohibitive Speech During the Day in Ramadhaan