Upvote:1
"Kayanupassana" comming under "Chathu Satipatthana". You can find detailed discription in "Maha Satipatthana Sutta"
Also refer and search for "Anapanasati Meditation".
Refer:http://www.accesstoinsight.org/tipitaka/mn/mn.118.than.html
Upvote:2
Kayagata-sati Sutta. Buddha was explicit that breathing is part of the body, so anapanasati is a sub-set of body scanning.