John Gill Commentary Genesis 31:41

"These twenty years have I been in thy house; I served thee fourteen years for thy two daughters, and six years for thy flock: and thou hast changed my wages ten times." — Genesis 31:41 (ASV)

Thus have I been twenty years in your house Attended with these difficulties, inconveniencies, and hardships; I served you fourteen years for your two daughters ; Rachel and Leah; first seven years for Rachel; and having Leah imposed upon him instead of her, was obliged to serve seven years more, which he did for her sake; whereas he ought to have given them, and a dowry with them, to one who was heir to the land of Canaan, and not have exacted servitude of him: and six years for your cattle , to have as many of them for his hire, as were produced from a flock of white sheep, that were speckled, spotted, or ringstraked, or brown: and you have changed my wages ten times; (See Gill on Genesis 31:7);