George Leo Haydock, on Ps 112:9

Children. Anna and Elizabeth, who were naturally barren, were blessed with what they so eagerly desired, by the divine power. (Haydock) — It may be understood of the Gentile world, after it had embraced the faith, (St. Jerome; Galatians iv. 17.; St. Chrysostom) or of the captives, (Isaias lvi. 1., and xlix. 21., and Psalm lxvii. 7.; Calmet) though Isaias may also refer to the Church. (Haydock) — Joseph was wonderfully advanced in glory, and Sara, Rebecca, &c., were made fruitful. Bible Text & Cross-references: God is to be praised, for his regard to the poor and humble. 1 Alleluia. Praise the Lord, ye children: praise ye the name of the Lord. 2 Blessed be the name of the Lord, from henceforth now and for ever. 3 *From the rising of the sun, unto the going down of the same, the name of the Lord is worthy of praise. 4 The Lord is high above all nations: and his glory above the heavens. 5 Who is as the Lord, our God, who dwelleth on high: 6 and looketh down on the low things in heaven and in earth? 7 Raising up the needy from the earth, and lifting up the poor out of the dunghill: 8 That he may place him with princes, with the princes of his people. 9 Who maketh a barren woman to dwell in a house, the joyful mother of children.