Genesis 30:29

And he said unto him, Thou knowest how I have served thee, and how thy cattle was with me.

Cross-references

In Genesis 31:6, Jacob makes the same claim to his wives: 'You know that I've worked for your father with all my strength.'

In Genesis 31:38-40, Jacob elaborates on this same testimony — detailing hardships like heat, cold, and sleeplessness during his service.