Psalms 129:8

“Neither do they which go by say, the blessing of the Lord [be] upon you, etc.] As was usual with passengers, when they went by where mowers, and reapers, and binders, were at work in the field in harvest time; who used to wish the presence and blessing of God with them, and upon their labours; and who returned the salutation, as may be seen in Boaz and his reapers, (<080204>Ruth 2:4); we bless you in the name of the Lord; which is either a continuation of the blessing of the passengers, or the answer of the reapers to them; so the Targum, “nor do they answer them, “we bless you”,” etc. The sense is, that those wicked men would have no blessing on them, from God nor men; that no God speed…”

“Neither do they which go by say, The blessing of the Lord,... - As in a harvest-field, where persons passing by express their joy and gratitude that their neighbors are reaping an abundant harvest. The phrase “The blessing of the Lord be upon you,” was expressive of good wishes; of pious congratulation; of a hope of success and prosperity; as when we say, “God be with you;” or, “God bless you.” The meaning here is, that such language would never be used in reference to the grass or grain growing on the house-top, since it would never justify a wish of that kind: it would be ridiculous and absurd to apply such language to anyone who should be found gathering up that dry; and withered, and…”

“The blessing - Which was an usual salutation given by passengers to reapers: so the meaning is, it never continues 'till the harvest comes. Next: Psalms Chapter 130”

“The blessing: Psa 118:26; Rut 2:4 Next: Psalms Chapter 130”