What goes around comes around
Definition 1 of 1
Pro Tip 1/3Causal Connection
Understand that this phrase suggests a link between actions and consequences in the future. 
He took credit for my work, but what goes around comes around, so I'm not worried.
Pro Tip 2/3Moral Lesson
Use it to highlight moral lessons about fair play or justice in stories or experiences. 
After the corrupt politician was finally arrested, everyone said, 'What goes around comes around.'
Pro Tip 3/3Idiomatic Usage
Identify it as an idiomatic expression rather than a literal phrase; its meaning is not about physical movement. 
He always helps others and believes what goes around comes around.