ESV: David was thirty years old when he began to reign, and he reigned forty years.
NIV: David was thirty years old when he became king, and he reigned forty years.
NASB: David was thirty years old when he became king, and he reigned for forty years.
CSB: David was thirty years old when he began his reign; he reigned forty years.
NLT: David was thirty years old when he began to reign, and he reigned forty years in all.
KJV: David was thirty years old when he began to reign, and he reigned forty years.
NKJV: David was thirty years old when he began to reign, and he reigned forty years.