'Encourage' in the Bible

Then David said unto the messenger, Thus shalt thou say unto Joab, Let not this thing displease thee, for the sword devoureth one as well as another: make thy battle more strong against the city, and overthrow it: and encourage thou him.

“Now get up! Go out and encourage your soldiers, for I swear by the Lord that if you don’t go out, not a man will remain with you tonight. This will be worse for you than all the trouble that has come to you from your youth until now!”