John Gill's Bible Commentary Ver. 4. David [was] thirty years old when he began reign , etc.] Over Judah, which was the age of his antitype Christ, when he entered upon his public ministry, ( Luke 3:23); [and] he reigned forty years ; and six months, as appears by ( 2 Samuel 5:5); but the months are not mentioned, only the round number of years given: two reasons the Jews give for this; the one, that he fled six months from Absalom; the other is, that he was ill in Hebron so long, and therefore are not reckoned.
Matthew Henry Commentary
Verses 1-5 - David was anointed king a third time. His advances were gradual, tha his faith might be tried, and that he might gain experience. Thus his kingdom typified that of the Messiah, which was to come to its heigh by degrees. Thus Jesus became our Brother, took upon him our nature dwelt in it that he might become our Prince and Saviour: thus the humbled sinner takes encouragement from the endearing relation, applie for his salvation, submits to his authority, and craves his protection.
Original Hebrew בן1121 שׁלשׁים7970 שׁנה8141 דוד1732 במלכו4427 ארבעים705 שׁנה8141 מלך׃4427
