Psalm 126:1
126:1 A Song of degrees. When the LORD turned again the
      captivity of Zion, we were like them that {a} dream.

      (a) Their deliverance was incredible and therefore took
          away all excuse for ingratitude.

Psalm 126:2
126:2 Then was our mouth {b} filled with laughter, and our
      tongue with singing: then said they among the {c} heathen,
      The LORD hath done great things for them.

      (b) He shows how the godly should rejoice when God gathers
          his Church or delivers it.

      (c) If the infidels confess God's wonderful work, the
          faithful can never show themselves sufficiently
          thankful.

Psalm 126:4
126:4 Turn again our captivity, O LORD, as the {d} streams in
      the south.

      (d) It is no more impossible for God to deliver his people
          than to cause the rivers to run in the wilderness and
          barren places.

Psalm 126:6
126:6 He that goeth forth and weepeth, bearing {e} precious
      seed, shall doubtless come again with rejoicing, bringing
      his sheaves [with him].

      (e) That is, seed which was scarce and dear: meaning, that
          they who trusted in God's promise to return had their
          desire.