Kamma & Fruit = Action &
Reaction = Cause & Effect..

The Blessed Buddha once said:
Beings are owners of their actions
(kamma = karma), inheritors of their actions,
they are created by their actions, linked to their actions, their actions produce
their destiny. Whatever actions they do - good as evil - the resulting reaction
and
later effect will be theirs only! There is the one who kills living beings,
who steals
what belongs to others, commits adultery with others' partners, speaks
false lies,
speaks divisive and aggressive speech, prattles empty gossip,
who is greedy, envious,
jealous, wicked-minded, and of evil views. Such one is creeping in all bodily, verbal,
and
mental actions. Hidden and secret are such
one's actions, words, and thoughts,
of crooked and concealed motives. But I tell you: Whoever pursues
such deceptive
evil ways will have to expect one of these two results: Either the torture of hell, or
birth among the creeping animals. Thus is it with all rebirths of any
living being:
They will be reborn exactly according to the ethics of their actions
(kamma)...
When reborn, they experience the mirror
effects of their own past behaviour.
It is therefore I declare: Beings are owners,
inheritor and debtor of their actions,
they are born and created by their actions, coupled to their actions, as a shadow
that never leaves! Their past actions produce and condition their future destiny.
Whatever action they perform - good as evil - the resulting reaction and effects
will be only theirs! Kamma causes and creates rebirth.. A shadow that never leaves!
For details on the mechanics
of Kamma = Intentional Action see:
https://What-Buddha-Said.net/drops/II/Kamma_is_intention.htm
https://What-Buddha-Said.net/drops/II/Buddha_on_Kamma.htm
https://What-Buddha-Said.net/drops/III/Inevitable_Consequences.htm
https://What-Buddha-Said.net/drops/II/Good_Action_dilutes_Evil_Kamma.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_short_&_long_life.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Health_&_Sickness.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Low_or_High_Birth.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Wealth_or_Poverty.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Beauty_&_Ugliness.htm
https://What-Buddha-Said.net/drops/II/Effect_of_kammic_Action_is_Delayed.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Power_or_Disrespect.htm
https://What-Buddha-Said.net/drops/II/Evil_Kamma_enhances_other_Evil_Kamma.htm
https://What-Buddha-Said.net/drops/II/Good_Action_enhances_other_Good_Kamma.htm
https://What-Buddha-Said.net/drops/II/Kamma_leading_to_Stupidity_or_Intelligence.htm
Source:
Numerical Discourses of the Buddha.
Anguttara Nikāya AN 10:205
http://store.pariyatti.org/Numerical-Discourses-of-the-Buddha_p_4240.html