ßÊÇÈ ÇáÃäÈíÇÁ : Hadeeth No:3172 : Abu Huraira:
The Prophet said, "Al-Khadir was named so because he sat over a barren
white land, it turned green with plantation after (his sitting over
it."...
ßÊÇÈ ÇáÚáã : Hadeeth No:95 : Anas:
Whenever the Prophet spoke a sentence (said a thing), he used to repeat it thrice so that the people could understand it properly from him and whenever he asked permission to enter, (he knocked the door) thrice with greeting. ...