Answer

The repayment of a bad action is one equivalent to it. But if someone pardons and puts things right, his reward is with Allah. Certainly He does not love wrongdoers. But if people do defend themselves when they are wronged, nothing can be held against them for doing that. There are only grounds against those who wrong people and act as tyrants in the earth without any right to do so. Such people will have a painful punishment. But if someone is steadfast and forgives, that is the most resolute course to follow. (Qur’an, 42:40-43)

Answer:

1. If you want to retaliate, retaliate to the same degree as the injury done to you. But if you are patient, it is better to be patient. (16:126)
2. That is so. And if anyone inflicts an injury the same as the one done to him and then is again oppressed, Allah will come to his aid. Allah is All-Pardoning, Ever-Forgiving. (22:60)