2 Samuel 5:5
in Hebron, reigned he over Judah, seven years, and six months, - and, in Jerusalem, reigned he thirty and three years, over all Israel and Judah.
2 Samuel 2:11
And it came to pass, that, the number of the days that David was king in Hebron, over the house of Judah, was seven years and six months.
1 Chronicles 3:4
six born to him in Hebron, and he reigned there, seven years and six months. And, thirty and three years, reigned he, in Jerusalem.
1 Kings 2:11
Now, the days that David reigned over Israel, were forty years, - in Hebron, reigned he seven years, and, in Jerusalem, reigned he thirty and three years.
Treasury of Scripture Knowledge
Summary
                            In Hebron he reigned over Judah seven years and six months: and in Jerusalem he reigned thirty and three years over all Israel and Judah.                        
                    Seven years
Bible References
Seven years
                                        2 Samuel 2:11                                        
                                                                                                                                And it came to pass, that, the number of the days that David was king in Hebron, over the house of Judah, was seven years and six months.
                                    
                                        1 Kings 2:11                                        
                                                                                                                                Now, the days that David reigned over Israel, were forty years, - in Hebron, reigned he seven years, and, in Jerusalem, reigned he thirty and three years.
                                    
                                        1 Chronicles 3:4                                        
                                                            
                        six born to him in Hebron, and he reigned there, seven years and six months. And, thirty and three years, reigned he, in Jerusalem.