Ashtanga yoga means eight limbs, or steps, and these comprise: yama; niyama; asana; pranayama; pratyahara; dharana; dhyana; and samadhi.
Yama
Yama,the first limb,consists of five parts: ahimsa; satya; asteya; brahmacharya; and aparigraha.
What is aparigraha? If the mortal body is to be sustained, things like food are essential. After all, by sustaining the body, does one not attain divinity through following the righteous path? Thus, the food we eat should be pure (sattvic), untainted (nirmala), and acquired through righteousness, and not be secured by cheating, deceit, persecution, or other unjust means. Only taking as much food as we need to maintain our bodies, and not desiring things of enjoyment which are superflous to the physical body, is aparigraha. If the limb called aparigraha is firmly practiced, details of previous and future births are revealed to the yogi.,