At the beginning of its history, the people of Israel are unlike other peoples in that they have no king, for they recognize the dominion of Yahweh alone. It is God who intervenes on Israel's behalf through charismatic individuals, as recorded in the Book of Judges. The people approach the last of these individuals, Samuel, prophet and judge, to ask for a king (cf. 1 Sam 8:5; 10:18-19). Samuel warns the Israelites about the consequences of a despotic exercise of kingship (cf. 1 Sam 8:11-18). However, the authority of the king can also be experienced as a gift of Yahweh who comes to the assistance of his people (cf. 1 Sam 9:16). In the end, Saul is anointed king (cf. 1 Sam 10:1-2). These events show the tension that brought Israel to understand kingship in a different way than it was understood by neighbouring peoples. The king, chosen by Yahweh (cf. Dt 17:15; 1 Sam 9:16) and consecrated by him (cf. 1 Sam 16:12-13), is seen as God's son (cf. Ps 2:7) and is to make God's dominion and plan of salvation visible (cf. Ps 72). The king, then, is to be the defender of the weak and the guarantor of justice for the people. The denunciations of the prophets focus precisely on the kings' failure to fulfil these functions (cf. 1 Kg 21; Is 10:1-4; Am 2:6-8, 8:4-8; Mic 3:1-4).
The prototype of the king chosen by Yahweh is David, whose humble origins are a favourite topic of the biblical account (cf. 1 Sam 16:1-13). David is the recipient of the promise (cf. 2 Sam 7:13-16; Ps 89:2-38, 132:11-18), which places him at the beginning of a special kingly tradition, the “messianic” tradition. Notwithstanding all the sins and infidelities of David and his successors, this tradition culminates in Jesus Christ, who is par excellence “Yahweh's anointed” (that is, “the Lord's consecrated one”, cf. 1 Sam 2:35, 24:7,11, 26:9,16; Ex 30:22-32), the son of David (cf. Mt 1:1-17; Lk 3:23-38; Rom 1:3). The failure of kingship on the historical level does not lead to the disappearance of the ideal of a king who, in fidelity to Yahweh, will govern with wisdom and act in justice. This hope reappears time and again in the Psalms (cf. Ps 2, 18, 20, 21, 72). In the messianic oracles, the figure of a king endowed with the Lord's Spirit, full of wisdom and capable of rendering justice to the poor, is awaited in eschatological times (cf. Is 11:2-5; Jer 23:5-6). As true shepherd of the people of Israel (cf. Ezek 34:23-24, 37:24), he will bring peace to the nations (cf. Zech 9:9-10). In Wisdom Literature, the king is presented as the one who renders just judgments and abhors iniquity (cf. Prov 16:12), who judges the poor with equity (cf. Prov 29:14) and is a friend to those with a pure heart (cf. Prov 22:11). There is a gradual unfolding of the proclamation of what the Gospels and other New Testament writings see fulfilled in Jesus of Nazareth, the definitive incarnation of what the Old Testament foretold about the figure of the king.