المزامير ١٣٣:١

A Psalm of praise, in which God's relations to His Church, His power in the natural world, and in delivering His people, are contrasted with the vanity of idols and idol-worship. (Psa. 135:1-21) In the general call for praise, the priests, that stand in the house of the Lord, are specially mentioned.

Behold, how good and how pleasant it is,.... Aben Ezra thinks the word thing should be supplied; the thing is what follows; for brethren to dwell together in unity: which the Targum interprets of Zion and Jerusalem, as two brethren; Aben Ezra of the priests; Kimchi of the King Messiah and the priest; and Jarchi, and Kimchi's father, of the Israelites; which is best of all, especially of those who are Israelites indeed; for this is not to be understood of all mankind, who are in some sense brethren, being all of one blood, and among whom peace is to be cultivated; nor merely of those of the same nation, under one and the same government, who should endeavour to live peaceably and quietly; nor of brethren in a strict natural state, who belong to the same family, and are of the same parents, and should be kindly affectioned one to another; but rather of such who are so in a spiritual sense, who have God for their fatherly adoption and regeneration, are related to Christ the firstborn among many brethren, and are members one of another, in the same church state; all which are a reason why they should love as brethren, and endeavour to keep the unity of the Spirit in the bond of peace, Mat 23:8, Pe1 2:17; and "to dwell together in unity"; even as one man, as if one soul actuated them all; it is not only to dwell and abide in the house of God, where they have all a name and a place; but to associate together there, to go up to the house of God in company, and with delight to join together in acts of religious worship; to serve the Lord with one consent, with one mind and mouth to glorify God, and to be of one accord, having the same love; and to do all kind and good offices one to another in the most hearty and cordial manner; serving each other in love, bearing one another's…

Here see, I. What it is that is commended - brethren's dwelling together in unity, not only not quarrelling, and devouring one another, but delighting in each other with mutual endearments, and promoting each other's welfare with mutual services. Sometimes it is chosen, as the best expedient for preserving peace, that brethren should live asunder and at a distance from each other; that indeed may prevent enmity and strife (Gen 13:9), but the goodness and pleasantness are for brethren to dwell together and so to dwell in unity, to dwell even as one (so some read it), as having one heart, one soul, one interest. David had many sons by many wives; probably he penned this psalm for their instruction, to engage them to love another, and, if they had done this, much of the mischief that arose in his family would have been happily prevented. The tribes of Israel had long had separate interests during the government of the Judges, and it was often of bad consequence; but now that they were united under one common head he would have them sensible how much it was likely to be for their advantage, especially since now the ark was fixed, and with it the place of their rendezvous for public worship and the centre of their unity. Now let them live in love. II. How commendable it is: Behold, how good and how pleasant it is! It is good in itself, agreeable to the will of God, the conformity of earth to heaven. It is good for us, for our honour and comfort. It is pleasant and pleasing to God and all good men; it brings constant delight to those who do thus live in unity. Behold, how good! We cannot conceive or express the goodness and pleasantness of it. Behold it is a rare thing, and therefore admirable. Behold and wonder that there should be so much goodness and pleasantness among men…

Ps 133 In this wisdom psalm (see Ps 1), peaceful and harmonious relationships manifest the presence of God. 133:1-2 The psalmist tells of the joy of consecrated relationships. 133:1 Brothers are related by blood, by profession, or by commitment.