Matthew 5:6 (BSB)

Blessed are those who hunger and thirst for righteousness, for they will be filled.

From Matthew 5. Also in the ESV.

Commentary on Matthew 5:6

• John Calvin (Reformed), Calvin's Commentaries on Matthew 5:6: 6. Happy are they who hunger To hunger and thirst is here, I think, used as a figurative expression, “Par une figure qu'on appelle Synecdoche;” — “by a figure which is called Synecdoche,” in which a part is put for the whole. and means to suffer poverty, to want the necessaries of life, and even to be defrauded of one’s right.
• 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 5:6: Blessed are they which do hunger and thirst,.... Not after the riches, honours, and pleasures of this world, but after righteousness; by which is meant, not justice and equity, as persons oppressed and injured; nor a moral, legal righteousness, which the generality of the Jewish nation were eagerly pursuing; but the justifying righteousness of Christ, which is imputed by God the Father, and received by faith.
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Matthew 5:6: Verse 6. Blessed are they that hunger, etc. Hunger and thirst, here, are expressive of strong desire. Nothing would better express the strong desire which we ought to feel to obtain righteousness, than hunger and thirst. No wants are so keen, none so imperiously demand supply as these.