The just shall live by faith

Hebrews 10:

35 Therefore do not cast away your confidence, which has great reward. 36 For you have need of endurance, so that after you have done the will of God, you may receive the promise:
       37 “ For yet a little while,
      And He^[j] who is coming will come and will not tarry.
       38 Now the^[k]just shall live by faith;
      But if anyone draws back,
      My soul has no pleasure in him.”^[l]
 

 39 But we are not of those who draw back to perdition, but of those who believe to the saving of the soul.