A dying father passes the mantle of leadership to his son during a historic changing of the guard. The primary approach among commentators is that King David composed this prayer at the end of his life, lying on his deathbed. It serves as his final plea for the success of his son Solomon, who is about to be crowned. At the same time, another perspective views this prayer as a prophecy pointing toward the future Messiah. In this light, the identity of Solomon is used symbolically, hinting at the ultimate perfection and peace that will define that future era [רד״ק, אבן עזרא, אלשיך, מאירי].
The new ruler holds a dual identity: he is both a king and the son of a king [רש״י]. He is already considered a king because David is in the process of crowning him, yet he remains a king's son because his father is still alive [מאירי]. These dual roles highlight exactly why he needs God's assistance. He requires divine help to fulfill his heavy responsibilities to lead and judge as a ruling monarch, and also to uphold his status as the royal heir inheriting his father's legacy [רד״ק, אלשיך].
Anticipating the future through divine inspiration, David knew that his son would eventually ask God for an understanding heart to judge the nation. Therefore, David prayed for this wisdom in advance [רש״י, מצודת דוד]. True, absolute justice belongs only to God, and human intellect is incapable of reaching it independently. To bridge this gap, David pleads for God to give the new ruler the wisdom and understanding needed to grasp divine laws. With this gift, the earthly verdicts he hands down will be perfectly straight, free from distortion, and a true reflection of God's own justice [רש״י, רד״ק, אלשיך, מאירי, מלבי״ם].
Alongside the plea for fair judgment, the prayer asks for divine righteousness, a concept understood in several complementary ways. It can mean the practical ability to apply the law fairly and ensure that every verdict is truly just [רש״י, אבן עזרא]. Alternatively, it is a request for God's grace, asking Him to grant the new king abundance, wealth, and goodness as a charitable gift, bolstered by the merit of his father [אלשיך, מצודת דוד].
Another approach draws a distinct line between these two ideas of justice and righteousness. Justice represents the interpersonal laws that stabilize the monarchy in the present, while righteousness reflects the proper relationship between humans and God, which guarantees the kingdom's survival for future generations [מלבי״ם]. Finally, a unique interpretation separates the two royal figures completely. In this view, David asks that any suffering or strict judgment fall solely upon himself as the outgoing king. Meanwhile, he prays that only grace and righteousness be directed toward his son, ensuring that the new ruler will enjoy a reign of total peace [רש״י].