Psalm 127:1
127:1 A Song of degrees for Solomon. Except the LORD {a}
      build the house, they labour in vain that build it: except
      the LORD keep the {b} city, the watchman waketh [but] in
      vain.

      (a) That is, govern and dispose all things pertaining to
          the family.
      (b) The public estate of the commonwealth.

Psalm 127:2
127:2 [It is] vain for {c} you to rise up early, to sit up late,
      to eat the bread {d} of sorrows: [for] so he giveth his
      beloved {e} sleep.

      (c) Who watch and ward and are also magistrates and rulers
          of the city.
      (d) Either that which is gained by hard labour, or eaten
          with grief of mind.
      (e) Not exempting them from labour, but making their
          labours comfortable and as it were a rest.

Psalm 127:4
127:4 As arrows [are] in the hand of a mighty man; so [are] {f}
      children of the youth.

      (f) That is, endued with strength and virtues from God:
          for these are signs of God's blessings, and not the
          number.

Psalm 127:5
127:5 Happy [is] the man that hath his quiver full of them: they
      {g} shall not be ashamed, but they shall speak with the
      enemies in the gate.

      (g) Such children will be able to stop their adversaries
          mouths, when their godly life is maliciously accused
          before judges.