Charles H. Spurgeon on Psalms 128:2

For thou shalt eat the labour of thine hands, etc. There is a fourfold literal sense here: Thou shalt live by honest, peaceful labour, not by rapine and violence on that produced by the toil of others, nor yet indolently and luxuriously; thou shalt "eat", and not penuriously stint thyself and others; thy crops shall not be blighted, but shall bring forth abundantly; and no enemy shall destroy or carry off thy harvest. And these two latter interpretations accord best with the converse punishments threatened to the disobedient by Moses. "Thou shalt eat the labour of thine hands". But he who hates labour does not eat of it, nor can he say, "My meat is to do the will of him that sent me, and to finish his work": Joh 4:34. On the other hand, he to whom such labour is a delight, does not merely look forward in hope to the future fruits or rewards of labour, but even here and now finds sustenance and pleasure in toiling for God; so that it is "well" with him in the world, even amidst all its cares and troubles, and he "shall be happy" in that which is to come, whence sorrow is banished for ever, as it is written in the gospel: "Blessed is he that shall eat bread in the kingdom of God": Lu 14:15. —Neale and Littledale.