Date Nut Pound Cake

1 pound butter
2 cups granulated sugar
6 eggs
1 (1 ounce) bottle lemon extract
4 cups all-purpose flour, divided
1 pound dates, chopped
4 cups pecans and walnuts, finely chopped

Cream butter well. Add sugar and beat until smooth and fluffy. Add eggs one at a time, beating well after each addition. Add flavoring. sprinkle 1 cup of the flour over nuts and dates. Add remaining 3 cups flour to creamed mixture.Add dates and nuts. Mix well and spoon into well greased 10-inch tube pan. Bake at 300 degrees F for 2 hours. Remove from oven and turn upside down for a few minutes.