Isaiah 55:2

“Wherefore do ye spend money for that which is not bread? &c.] Lavish away time, opportunities, and strength, in reading and hearing false doctrine, which is not bread, but chaff; is not wholesome, does not nourish, but is harmful and destructive; eats as does a canker, instead of feeding and refreshing; such as the vain philosophy of the Gentiles, the traditions of the Jews, and the errors and heresies of false teachers: and your labour for that which satisfieth not? labouring to seek for happiness in worldly things, which is not to be had; or to obtain righteousness by the works of the law, which is not to be attained to in that way; all such labour is in vain, no satisfaction is enjoyed,…”

“not bread-- (Hab 2:13). "Bread of deceit" (Pro 20:17). Contrast this with the "bread of life" (Joh 6:32, Joh 6:35; also Luk 14:16-20). satisfieth not-- (Ecc 1:8; Ecc 4:8). hearken . . . and eat--When two imperatives are joined, the second expresses the consequence of obeying the command in the first (Gen 42:18). By hearkening ye shall eat. So in Isa 55:1, "buy and eat." By buying, and so making it your own, ye shall eat, that is, experimentally enjoy it (Joh 6:53). Compare the invitation (Pro 9:5-6; Mat 22:4). fatness-- (Psa 36:8; Psa 63:5).”

“Wherefore do ye spend money - Margin, ‘Weigh.’ That is, in Hebrew, ‘weigh silver.’ Before money was coined, the precious metals were weighed, and hence, to make a payment is represented as weighing out silver Genesis 23:16. For that which is not bread - The idea here is, that people are endeavoring to purchase happiness, and are disappointed. Bread is the support of life; it is therefore emblematic of whatever contributes to support and comfort. And in regard to the pursuit of happiness in the pleasures of life, and in ambition, vanity, and vice, people are as much disappointed, as he would be who should spend his money, and procure nothing that would sustain life. And your labor for that…”

“Money - All your time, and strength, and cost. Not bread - For those things which can never nourish or satisfy you, such as worldly goods, or pleasures. Eat ye - That which is truly and solidly, and everlastingly good. In fatness - In this pleasant food of gospel - enjoyments. Isaiah 55:3”

“55:2 Listen to me . . . eat what is good: Responding positively to God satisfies one’s spiritual, social, and physical being (see 1:19; 58:13-14; Prov 4:10).”

“do ye: Isa 44:20; Jer 2:13; Hos 8:7, Hos 12:1; Hab 2:13; Mat 15:9; Luk 15:15, Luk 15:16; Rom 9:31, Rom 10:2, Rom 10:3; Phi 3:4-7; Heb 13:9 spend: Heb. weigh, Isa 46:6 Hearken: Isa 51:1, Isa 51:4, Isa 51:7; Exo 15:26; Deu 11:13; Psa 34:11; Pro 1:33, Pro 7:23, Pro 8:32; Mar 7:14; Rom 10:17 eat: Isa 25:6; Psa 22:26, Psa 36:8, Psa 63:5; Pro 9:5; Jer 31:14; Mat 22:4; Luk 15:23; Joh 6:48-58 Isaiah 55:3”