I felt obligated.

Source: Tatoeba

Every player is under obligation to keep the rules.

Source: Tatoeba

I believe it my duty to protect these children.

I believe it's my duty to protect these children.

I believe that it's my duty to protect these children.

Source: Tatoeba

It is our obligation to help.

Source: Tatoeba

Gentleness and cheerfulness, these come before all morality; they are the perfect duties.

Source: Tatoeba

It is our duty to obey the law.

Source: Tatoeba