There shalt not an hair ... - This was a proverbial expression, meaning "he shall suffer no hurt at all." Solomon's clemency in pardoning Adonijah is very remarkable. In the East not only are pretenders almost always punished with death, but it has often been the custom for each king upon his accession to put to death all his brothers as mere possible pretenders.

If he will show himself a worthy man - If, from henceforth, he behave well, show himself to be contented, and not endeavor to make partisans, or stir up insurrections among the people, he shall be safe; but if wickedness be found in him - if he act at all contrary to this - he shall die; his blood shall be upon him.

And Solomon said, if he will show himself a worthy man,.... Will behave himself well as a good subject, and be careful not to offend for the future, or appear to be one that fears sin, as the Targum; particularly the crimes of sedition, rebellion, and treason:

there shall not an hair of him fall to the earth; not the least harm should be done him:

but if wickedness shall be found in him, he shall die; that is, if any crime worthy of death be committed by him, or any overt act of treason, and the like, he should surely be put to death, and find no mercy, notwithstanding the present general pardon. This was very wisely done by Solomon, to begin his reign without shedding blood even of delinquents; and especially of his brother, and his elder brother too; and by granting his life for the future on his good behaviour.

And Solomon said, If he will show himself a worthy man, there shall not an hair of him fall to the earth: but if wickedness shall be found in him, he shall die.

1:32-53 The people expressed great joy and satisfaction in the elevation of Solomon. Every true Israelite rejoices in the exaltation of the Son of David. Combinations formed upon evil principles will soon be dissolved, when self-interest calls another way. How can those who do evil deeds expect to have good tidings? Adonijah had despised Solomon, but soon dreaded him. We see here, as in a glass, Jesus, the Son of David and the Son of God, exalted to the throne of glory, notwithstanding all his enemies. His kingdom is far greater than that of his father David, and therein all the true people of God cordially rejoice. The prosperity of his cause is vexation and terror to his enemies. No horns of the altar, nor forms of godliness, nor pretences to religion, can profit those who will not submit to His authority, and accept of his salvation; and if their submission be hypocritical, they shall perish without remedy.