Verses with the word comfortable in the Old Testament (2 verses):

2 Samuel 14:17
Then thine handmaid said, The word of my lord the king shall now be comfortable: for as an angel of God, so is my lord the king to discern good and bad: therefore the LORD thy God will be with thee.

Zechariah 1:13
And the LORD answered the angel that talked with me with good words and comfortable words.