Volume 1, Book 10, Number 508:
Narrated Anas:
The Prophet said, “Whenever anyone of you offers his prayer he is speaking in private to his Lord.
So he should not spit to his right but under his left foot.” Qatada said, “He should not spit in front of
him but to his left or under his feet.” And Shu’ba said, “He should not spit in front of him, nor to his
right but to his left or under his foot.” Anas said: The Prophet said, “He should neither spit in the dir –
ection of his Qibla nor to his right but to his left or under his foot.”