John Gill Commentary Leviticus 19:25

"And in the fifth year shall ye eat of the fruit thereof, that it may yield unto you the increase thereof: I am Jehovah your God." — Leviticus 19:25 (ASV)

And in the fifth year shall you eat of the fruit of it And so in all succeeding years as long as the tree lasted and bore: that it may yield to you the increase of it ; may be so abundantly blessed, and produce so large an increase as to answer the three years' want of any fruit from it, and the dedication of the fruit of the fourth year to the Lord: I [am] the Lord your God ; who has promised this increase, is both able and faithful to make it good.