Yakobus 1:4

1:4 And let endurance have its perfect effect, so that you will be perfect and complete, not deficient in anything.

Yakobus 5:16

5:16 So confess your sins to one another and pray for one another so that you may be healed. The prayer of a righteous person has great effectiveness. ¹ 

[5:16]  ¹ tn Or “the fervent prayer of a righteous person is very powerful”; Grk “is very powerful in its working.”