This is the 18647th most frequent Korean word.
신도들의
"신도들의" means "belonging to the believers" or "of the followers."
신도들의 is used to describe the possessive form indicating that the faith belongs to the devotees.
신도들의 믿음은 깊습니다.
The faith of the devotees is deep.
Here, 신도들의 is used to signify ownership, indicating that the prayers are those of the devotees.
신도들의 기도가 사원에 울려 퍼졌습니다.
The prayers of the devotees resounded in the temple.
In this example, 신도들의 refers to the devotees to show whose actions are being talked about.