William Burkitt on Matthew 5:7

Here our blessed Redeemer recommends to us a compassionate regard towards the miseries of others, and that both in soul and body, name and estate; to be forward to pity and pardon, to relieve and help, to give and forgive.

And as an encouragement, he adds, that as we deal with others, God will deal with us; our charity towards men shall be crowned with mercy from God, and that in abundance too; for our rivulet of charity we shall partake of an ocean of mercy: Blessed are the merciful, for they shall obtain mercy.

Learn, That the merciful man is a blessed man, and therefore blessed because he shall obtain mercy, when he most wants it, and most desires it. Mercy, not wages.