Do right by somebody
Definition 1 of 1
Pro Tip 1/3Ethical Conduct
Use it when highlighting moral or ethical actions in personal or professional relationships. 
She wanted to do right by her community by volunteering at the shelter.
Pro Tip 2/3Emotional Weight
The phrase carries emotional depth, often implying a sense of responsibility or integrity. 
After the misunderstanding, he felt obligated to do right by his friend.
Pro Tip 3/3Cultural Nuance
Understand that 'doing right by' can vary in meaning across cultures based on different social norms. 
In his culture, doing right by family meant supporting them financially.