Matthew 5:9
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. 11 Blessed are you when people insult you and persecute you and say all kinds of evil things about you falsely on account of me.
Pirkei Avot 1:12
Mishnah9 Shimon ben Shetach used to say: be thorough in the interrogation of witnesses, and be careful with your words, lest from them they learn to lie. 10 Shemaiah and Abtalion received [the oral tradition] from them. Shemaiah used to say: love work, hate acting the superior, and do not attempt to draw near to the ruling authority. 11 Abtalion used to say: Sages be careful with your words, lest you incur the penalty of exile, and be carried off to a place of evil waters, and the disciples who follow you drink and die, and thus the name of heaven becomes profaned. 12 Hillel and Shammai received [the oral tradition] from them. Hillel used to say: be of the disciples of Aaron, loving peace and pursuing peace, loving mankind and drawing them close to the Torah. 13 He [also] used to say: one who makes his name great causes his name to be destroyed; one who does not add [to his knowledge] causes [it] to cease; one who does not study [the Torah] deserves death; one who makes [unworthy] use of the crown [of learning] shall pass away.
Notes and References
"... 'Blessed are the peacemakers, for they shall be called the children of God.' How should one understand 'the peacemakers'? The following texts offer assistance. Proverbs 10:10 LXX ('The one who reproves boldly is a peacemaker'); 2 Enoch 52:11 ('Blessed is the one who cultivates the love of peace'); Mishnah Abot 1:12 (Hillel said: 'Be of the disciples of Aaron, loving peace and pursuing peace'); and Mishhah Peah 1:1 ('These are things whose fruits one enjoys in this world while the capital is laid up for him in the world to come: ... making peace between a man and his fellow') express sentiments that are similar to those found in Romans 12:18, 1 Corinthians 7:15, and Hebrews 12:14 ..."
Talbert, Charles H. Reading the Sermon on the Mount: Character Formation and Decision Making in Matthew 5-7 (p. 53) University of South Carolina Press, 2004