Israel's abstinence from certain sorts of meat
God used the food laws to teach Peter a spiritual lesson.
Israel's abstinence from other things
See also
Abstinence from food
As an expression of repentance
Expressing a seeking after God
pp Lk 4:1-2
pp Mk 2:18-20
pp Lk 5:33-35
Temporary sexual abstinence as a form of discipline
Denial of selfish desires
pp Mk 8:34
pp Lk 9:23
Voluntary abstinence for the sake of others
Abstinence may be hypocritical