5 And Salmon begat Booz of Rachab; and Booz begat Obed of Ruth; and Obed begat Jesse; 6 And Jesse begat David the king; and David the king begat Solomon of her that had been the wife of Urias; (Matthew 1:5-6 KJV)
Matthew Poole’s Commentary
(Ver. 5,6.) This agreeth with Ru 4:22; 1Sa 16:1,13. Here now ariseth the first difficulty we meet with in this genealogy, and it rather an appearance of a difficulty than a real one.
Salmon being the son of Aminadab, who was the prince of the children of Judah in Moses’s time, Salmon cannot be imagined to have lived later than in the times of Joshua.
Boaz seemeth to have lived in Eli’s time, which (if chronologers count right) was three hundred years after: here are but four men named to take up these years, Salmon, Booz, Obed, Jesse.
Answer. The world according to chronologers, wanted but five of two thousand five hundred years old, when the Israelites (under the conduct of Joshua) entered into Canaan: we will suppose Salmon to have then been a young man. Eli is by them said to have lived about the two thousand eight hundred and tenth. So that the distance is three hundred and fifteen years. David is said to have been born in the two thousand eight hundred and sixtieth. So as from Salmon to David are three hundred and sixty-five years. Admit Salmon, Boaz, Obed, and Jesse to have each of them lived a hundred years, or upward, in admitting this, if we consider the age and vigour of persons in that age of the world. Moses (though a man spent with travels and battles) lived one hundred and twenty years, De 34:7. Caleb at eighty-five years was strong and as fit for war as ever, Jos 4:11,12. If we allow these four men the life of Moses they might live four hundred and eighty years, which might allow to each of them fifteen or sixteen years apiece for the concurrency of their lives with their parents, yet three hundred and sixty-five years might be well allowed for all their time: nor is it unreasonable for us to suppose, that God might allow those whom he intended thus to dignify a something longer life than the ordinary sort of men lived in that age of the world. So as the thing being neither naturally impossible (for in our age we see particular persons live upward of a hundred years) nor morally improbable, and directly affirmed in three or four texts, they must have a great mind to quarrel with a Divine revelation who question the truth of it upon such a pretence; especially considering that the lives of men in our declining and debauched age of the world, are no measures by which we can guess at the lives of extraordinary persons who lived near three thousand years ago.
David the king: possibly that term is added to distinguish the David here intended from others of the same name; or because he was the first king of the tribe of Judah, to whom the sceptre of Israel was promised, Ge 49:10; or the first king not given to the Israelites in wrath, as Saul was upon their murmuring against Samuel: or to show that Christ descended from that family, to whom the promise of the Messias was made, Jer 23:5, and a kingdom established for ever, Ps 89:36,37. Thus our evangelist hath given us the names in his first period of fourteen generations: Abraham, Isaac, Jacob, Judas, Phares, Esrom, Aram, Aminadab, Naasson, Salmon, Boaz, Obed, Jesse, David.
Solomon was not the eldest child of David by Bathsheba; that died, 2Sa 12:22,23. He was born after David had taken Bathsheba (who had been the wife of Uriah) for his wife, 2Sa 12:25, compared with 2Sa 11:27. —-Matthew Poole’s Commentary