VERILY, this Qur'an shows the way to all that is most uprightand gives the believers who do good deeds the glad tiding that theirs will be a great reward;
Al-Isra (The Journey by Night) Verse 9
The Prophet said, "None of you should spit in front or on his right but he could spit either on his left or under his foot."
Sahih Bukhari: Volume 1, Book 8, Number 404