John 8:41
You are doing the deeds of your father." "We," they replied, "are not illegitimate children. We have one Father, namely God."
Romans 9:18
This is a proof that wherever He chooses He shows mercy, and wherever he chooses He hardens the heart.
Romans 11:22
Notice therefore God's kindness and God's severity. On those who have fallen His severity has descended, but upon you His kindness has come, provided that you do not cease to respond to that kindness. Otherwise you will be cut off also.
James 2:13
For he who shows no mercy will have judgement given against him without mercy; but mercy triumphs over judgement.