Who giveth food to all flesh - To all living things: all in the air, on the earth, in the waters. See the notes at Psalm 104:27-28; compare Psalm 115:16.
For his mercy - All this is a proof of his benignity and kindness. To see this, it would be necessary to have a view of what is done every day in the providence of God to meet the needs of the countless multitudes thus dependent on him. Let it be remembered, also, that the needs of each insect, fowl, animal; fish, is to be provided for as an individual - and who can take in a full view of the care, the wisdom, the benevolence of what is done every day by the Father of all in providing for their needs? Let it be remembered, also, that this has been continned without ceasing from the foundation of the world, and will be demanded until its close, and then let us try to imagine what is necessary to be done to provide for the needs of all the dwellers in distant worlds - and who, in this view, can form any proper estimate of the wisdom and the goodness of God?

Giveth food to all flesh - By whose universal providence every intellectual and animal being is supported and preserved. The appointing every living thing food, and that sort of food which is suited to its nature, (and the nature and habits of animals are endlessly diversified), is an overwhelming proof of the wondrous providence, wisdom, and goodness of God.
The Vulgate, Arabic, and Anglo-Saxon, add a twenty-seventh verse, by repeating here Psalm 136:3 very unnecessarily.

Who giveth food to all (h) flesh: for his mercy [endureth] for ever.
(h) Seeing that God provides even for the beasts much more has he care over his.

Who giveth food to all flesh,.... To all creatures; the beasts of the field, and fowls of the air, the young ravens that cry, Psalm 145:15. To all men their daily food; to Jews and Gentiles, good men and bad men, Matthew 6:11; and spiritual food to all that belong to Christ, who are flesh of his flesh, and bone of his bone; even himself, the bread of life, the wholesome truths of the Gospel, and its refreshing ordinances;
for his mercy endureth for ever; he continues to have compassion on his creatures, and opens his hand of providence, and supplies their wants; he is ever mindful of his covenant of grace and mercy, and therefore gives meat to them that fear him, Psalm 111:5.

To the special favors to His people is added the record of God's goodness to all His creatures (compare Matthew 6:30).

Food - To all living creatures. For which God deserves great praises, which the psalmist teaches us to render to God for them, because those who are most concerned, either cannot, or do not perform this duty.