Sforno on Genesis 30:25/ספורנו על בראשית ל׳:כ״ה

1שלחני ואלכה, even though Yaakov did not own any livestock at that time, seeing he had crossed the Yabbok with only his walking staff, he did have enough provisions and cash for himself and his extensive family. Had he not possessed these, it would have been irresponsible in the highest degree to undertake this kind of a journey relying on G’d’s miracles to sustain him. Furthermore, it is inconceivable that Lavan a wealthy and respected individual in his town, would consent to let Yaakov take his wives and children, Lavan’s own family, on a journey in which they would face death from starvation. Lavan’s objection to Yaakov’s departing at this time was based on self-interest. He pleaded with him, seeing he knew that his wealth had been due to Yaakov’s presence and he did not want to lose the source of his financial success.