Matthew 5:7
5 Blessed are the meek, for they will inherit the earth. 6 Blessed are those who hunger and thirst for righteousness, for they will be satisfied. 7 Blessed are the merciful, for they will be shown mercy. 8 Blessed are the pure in heart, for they will see God. 9 Blessed are the peacemakers, for they will be called the children of God. 10 Blessed are those who are persecuted for righteousness, for the kingdom of heaven belongs to them.
Tosefta Bava Kamma 9
ToseftaHe who injures his fellow, even though the one who did the injury did not seek forgiveness from the injured party - the injured party nonetheless has to seek mercy for him, since it says, 'Then Abraham prayed to God, and God healed Abimelech.' And so you find in regard to the friends of Job, as it said, 'Now, therefore take seven bulls and seven rams and go to my servant Job, and offer yourselves up a burnt offering; and my servant Job shall pray for you.' Rabbi Judah says in the name of Rabban Gamaliel, 'Lo, it says, '...and show you mercy and have compassion on you, and multiply you...' Let this sign be in your hand, 'So long as you are merciful, He will have mercy on you.'
Notes and References
"... But I say to you, Love your enemies and pray for those who persecute you (See the interesting Rabbinic parallel in Tosfeta Baba Qama 9:29-30) ... According to The Testament of Benjamin, one must not have 'two tongues, one of blessing and one of cursing ... but everything that Belial does is double and has nothing simple about it at all' (Testament of Benjamin 6:5f). According to Jesus, in loving one's neighbor one must be undivided, as God is undivided. Even in the Old Testament the saying 'an eye for an eye' (Exodus 21:24) was not taken literally. Jesus wanted to take the interpretation of this verse from Exodus further by explaining 'stripe for stripe' to mean turning the other cheek to receive yet another stroke. This, too, was in harmony with the pietistic spirit of the Essene fringe ..."
Flusser, David & Notley, R. Steven Jesus (pp. 99-100) Magnes Press, 1997