Psalm 127

“A song of the ascents: of Solomon. If Jehovah build not a house, in vain toil its builders in it; if Jehovah keep not a city, in vain watcheth a keeper. [It is] in vain for you rising up early, sitting up late, eating bread of (the) sorrows: so he giveth unto his beloved sleep. Behold, Jehovah's inheritance [are] children (sons), the womb's fruit [is] a reward. As arrows in a mighty man's hand, so are sons of (the) youth. Blessed [is] the man who hath filled his quiver with them. They shall not be ashamed when they speak with enemies in the gate” (vers. 1-5).
All of blessing turns on Jehovah, on Jehovah-Jesus. When Israel welcomes and depends on Him what fruitful showers! “Instead of thy fathers shall be thy children” as in Psa. 45 so here. Solomon had an earnest and might well sing in the Spirit; yet his was not the rest of God.