Matthew 5:9 (BSB)

Blessed are the peacemakers, for they will be called sons of God.

From Matthew 5. Also in the ESV.

Commentary on Matthew 5:9

• John Calvin (Reformed), Calvin's Commentaries on Matthew 5:9: 9. Happy are the peacemakers By peacemakers he means those who not only seek peace and avoid quarrels, as far as lies in their power, but who also labor to settle differences among others, who advise all men to live at peace, and take away every occasion of hatred and strife. There are good grounds for this statement.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Matthew 5:3-12: Christ begins his sermon with blessings, for he came into the world to bless us (Act 3:26), as the great High Priest of our profession; as the blessed Melchizedec; as He in whom all the families of the earth should be blessed, Gen 12:3.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Matthew 5:9: Blessed are the peace makers,.... Not between God and man, for no man can make his own peace with God; nor can any mere creature, angels, or men, make it for him; Christ, in this sense, is the only peace maker: but between men and men; and such are they, who are of peaceable dispositions themselves; live peaceably with all men, and with one another...
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Matthew 5:9: Verse 9. Blessed are the peacemakers. Those who strive to prevent contention, and strife, and war. Who use their influence to reconcile opposing parties, and to prevent lawsuits, and hostilities, in families and neighbourhoods. Every man may do something of this; and no man is more like God than he who does it.