He sendeth forth his commandment upon earth,.... Which Kimchi interprets of rain, which causes the wheat to grow; since afterwards mention is made of snow, and of hoar frost and ice. Aben Ezra understands it of the decree of God, which he executes on earth. The Targum, of the "Memra", or Word of the Lord; the essential Word, the Messiah; whom the Lord sent on earth to perform the great work of redemption and salvation; and who came speedily, and tarried not when the fulness of time was come, as follows. It may design God's word of providence, which answers to his word of power in the first creation of all things; and which orders everything done in the earth, and is instantly obeyed; which agrees with Psa 147:18. Or rather the word of the Gospel; the doctrines and ordinances of divine revelation, agreeably to Psa 147:19; and so may have respect to the mission of the apostles of Christ, and ministers of the word, to go into all the earth, and preach the Gospel to every creature; his word runneth very swiftly; so the Gospel did in the first times of it, like lightning, from one end of the heaven to the other; the words of it went into all the world, and the sound of it unto the ends of the earth; it had a free course, and was glorified: and so it will in the latter day, when many shall run to and fro, and knowledge shall be increased; see Rom 10:18.