Thy statutes have been my songs. [1] He repeats in different words what he had formerly mentioned, that the law of God was his sole or special delight during all his life. Singing is an indication of joy. The saints are pilgrims in this world, and must be regarded as God's children and heirs of heaven, from the fact that they are sojourners on earth. By the house of their pilgrimage, then, may be understood their journey through life. One circumstance merits particular notice, that David, during his exile from his native country, ceased not to draw consolation, amid all his hardships, from the law of God, or rather a joy which rose above all the sadness which his banishment occasioned to him. It was a noble specimen of rare virtue, that when he was denied a sight of the temple, could not draw near to the sacrifices, and was deprived of the ordinances of religion, he yet never departed from his God. The phrase, the house of his pilgrimage, is employed, therefore, to enhance the conduct of David, who, when banished from his country, still retained the law of God deeply engraved on his heart, and who, amid the severity of that exile, which was calculated to deject his spirits, cheered himself by meditating upon the law of God.

Footnotes

1 - "In the early ages, it was customary to versify the laws, that the people might learn them by heart, and sing them." -- Williams.

Thy statutes - Thy law; thy commandments.
Have been my songs - Have been to me a source of joy; have been my happiness, my consolation, my delight. I have found pleasure in meditating on them; I have had peace and joy in them in the day of loneliness and trouble. The psalmist rejoiced, doubtless, as the good now do,
(a) in law itself; law, as a rule of order; law, as a guide of conduct; law, as a security for safety;
(b) in such a law as that of God - so pure, so holy, so suited to promote "the happiness of man;
(c) in the stability of that law, as constituting his own personal security, the ground of his hope;
(d) in law in its influence on the universe, preserving order, and securing harmony.
In the house of my pilgrimage - In my life considered as a journey to another world; in my pilgrimage through the desert of this world; amidst rocks, and sands, and desolation; among tribes of savage men, wanderers, robbers, freebooters; with no home, no place of shelter; exposed to cold, and rain, and sleet, and ice, and snow, as pilgrims are - for to all these is the "pilgrim" - the way-farer - exposed, and all these represent the condition of one passing through this world to a better (compare Hebrews 11:13). Here, says the psalmist, I sang. I found joy in these scenes by thinking on the pure law - the pure and holy truth of God. I comforted myself with the feeling that there "is" law; that there is just government; that there is a God; that I am under the protection of law; that I am not alone, but that there is one who guides me by his truth. Compare the notes at Job 35:10. See Acts 16:25; Psalm 34:1.

Thy statutes have been my songs - During our captivity all our consolation was derived from singing thy praises, and chanting among our fellow-captives portions of thy law, and the precepts it contains.

Thy statutes have been my songs in the house of my (e) pilgrimage.
(e) In the course of this life and sorrowful exit.

Thy statutes have been my songs in the house of my pilgrimage. Meaning either his unsettled state, fleeing from place to place before Saul; or, literally, his house of cedar, his court and palace, which he considered no other than as an inn he had put into upon his travels homeward; or rather the earthly house of his tabernacle, in which, as long as he continued, he was but a pilgrim and stranger; or, best of all, the whole course of his life; which Jacob calls the days of the years of his pilgrimage, Genesis 47:9; so Hipparchus the Pythagorean (i) calls this life a sort of a pilgrimage; and Plato also. This world is not the saints house and home; this is not their rest and residence; they confess themselves pilgrims and strangers here; and that they belong to another city, and a better country, an heavenly one, which they are seeking and travelling to, Hebrews 11:13. And as travellers sing songs to themselves as they pass on, which makes the way the more easy and pleasant to them, so the psalmist had his songs which he sung in his pilgrimage state; and these were the statutes, or word of the Lord, and the things in it, which were as delightful to him as the songs of travellers to them. Or the songs he made and sung were composed out of the word of God; and which may serve to recommend the psalms, hymns, and spiritual songs, made by him, the sweet psalmist of Israel, to the Gospel churches, to be sung by them, Ephesians 5:19.
(i) De Anim. Tranquill. inter Fragm. Pythagor. p. 11. Ed. Gale.

songs--As the exile sings songs of his home (Psalm 137:3), so the child of God, "a stranger on earth," sings the songs of heaven, his true home (Psalm 39:12). In ancient times, laws were put in verse, to imprint them the more on the memory of the people. So God's laws are the believer's songs.
house of my pilgrimage--present life (Genesis 17:8; Genesis 47:9; Hebrews 11:13).

The house - In this world, wherein I am a stranger and pilgrim, as all my fathers were.