Old Testament Stories on being kind:

Ruth 1:14 :: Ruth’s kindness to Naomi came back to her when Boaz showed kindness (and love) to Ruth

1Kings 17:8,9 :: “The widow in Zarephath fed Elijah during a famine. Not only did she and her son live, but sometime later when her son became sick and died, Elijah raised him from the dead! So her kindness paid off.” ~ Kenneth Hagin

Gen. 24:15-19 :: Rebekah’s act of kindness to Abraham’s servant when he asked for a drink, she volunteered to water his camels as well

Joshua 2:1-21 :: Rahab’s kindness to the two spies

2 Samuel 9:1-13 :: Kindness to Mephibosheth