וַיִּמְלֹ֨ךְ שְׁלֹמֹ֧ה בִֽירוּשָׁלִַ֛ם עַל־כָּל־יִשְׂרָאֵ֖ל אַרְבָּעִ֥ים שָׁנָֽה׃
And Solomon reigned in Jerusalem over all Israel forty years.
Rashi on II Chronicles
over all Israel forty years unlike David, who reigned seven years in Hebron and thirty-three years in Jerusalem.