2 Samuel 5:4

2Sa 5:4 David [was] thirty years old when he began to reign, [and] he reigned forty years.

Ver. 4. David was thirty years old. ] So was Christ when he entered upon his kingdom, which he hath twofold: 1. Patientiae; of patience. 2. Potentiae, of power. Luk 3:22-23

And he reigned forty years. ] Which consisting of four tens, signifieth the fulness of times, and perfection of things, saith Angelomus: wherein also David was a type of Christ.