Hadith 266
´It was narrated that Abu Hurairah said:` "The Messenger of Allah said: 'Whoever is asked about knowledge that he has and he conceals it, will be bridled on the Day of Resurrection with reins of fire.'"
Hadith 431
´It was narrated that Anas bin Malik said:` "When the Messenger of Allah performed ablution, he ran his fingers through his beard and separated his fingers (to let water run through them) twice."