Rashi on Genesis 31:23/רש"י על בראשית ל״א:כ״ג

1את אחיו HIS BRETHREN — i.e. his kinsmen.

2דרך שבעת ימים SEVEN DAY’S JOURNEY — During all the three days during which the messenger had gone to tell Laban Jacob had proceeded on his journey. Consequently Jacob was then six days distance from Laban. On the seventh day i.e. on the day when Jacob covered that stretch of ground which made him seven days distant from Laban’s starting point Laban overtook him. We may infer, therefore, that all the distance that Jacob would have taken seven days to cover Laban covered in one day. And thus it states: “and he pursued after him seven day’s journey” and it does not say “and he pursued after him for seven days” (Genesis Rabbah 74:6).