And it shall come to pass in that day, I will hear, saith the LORD, I will hear {z} the heavens, and they shall hear the earth;

(z) Then will the heaven desire rain for the earth, which will bring forth things for the use of man.

Wesley's Notes

2:21 In that day - In the day of gospel - grace. I will hear - God the first and universal cause will influence the heavens, he will command their dew, and showers. When the earth is dry, it does as it were, cry to the heavens for refreshing showers, when the seed sown, the vines and olives planted, are at a stand, they cry to the earth for its kindly influences, that they may spring up, and yield fruit for Jezreel, which may call, and cry, but never will be satisfied if God does not hear them, and command his blessing which he promises to his people on renewing covenant with them. Now their repentance shall be blest with plenty, and God will set the frame of heaven and earth in due order to effect this; there shall be an harmony, between all subordinate causes moved by God the first great cause, whence expected events and fruits shall be produced for their good and comfort.

Jamieson-Fausset-Brown Bible Commentary

21. in that day-of grace to Israel.

heavens . hear the earth-personification. However many be the intermediate instruments, God is the Great First Cause of all nature's phenomena. God had threatened (Ho 2:9) He would take back His corn, His wine, &c. Here, on the contrary, God promises to hearken to the skies, as it were, supplicating Him to fill them with rain to pour on the earth; and that the skies again would hearken to the earth begging for a supply of the rain it requires; and again, that the earth would hearken to the corn, wine, and oil, begging it to bring them forth; and these again would hear Jezreel, that is, would fulfil Israel's prayers for a supply of them. Israel is now no longer "Jezreel" in the sense, "God will SCATTER" (Ho 1:4), but in the sense, "God will PLANT" (Ho 1:11).

Matthew Henry's Concise Commentary

2:14-23 After these judgments the Lord would deal with Israel more gently. By the promise of rest in Christ we are invited to take his yoke upon us; and the work of conversion may be forwarded by comforts as well as by convictions. But usually the Lord drives us to despair of earthly joy, and help from ourselves, that, being shut from every other door, we may knock at Mercy's gate. From that time Israel would be more truly attached to the Lord; no longer calling him Baali, or My lord and master, alluding to authority, rather than love, but Ishi, an address of affection. This may foretell the restoration from the Babylonish captivity; and also be applied to the conversion of the Jews to Christ, in the days of the apostles, and the future general conversion of that nation; and believers are enabled to expect infinitely more tenderness and kindness from their holy God, than a beloved wife can expect from the kindest husband. When the people were weaned from idols, and loved the Lord, no creature should do them any harm. This may be understood of the blessings and privileges of the spiritual Israel, of every true believer, and their partaking of Christ's righteousness; also, of the conversion of the Jews to Christ. Here is an argument for us to walk so that God may not be dishonoured by us: Thou art my people. If a man's family walk disorderly, it is a dishonour to the master. If God call us children, we may say, Thou art our God. Unbelieving soul, lay aside discouraging thoughts; do not thus answer God's loving-kindness. Doth God say, Thou art my people? Say, Lord, thou art our God.