Ramban on Genesis 14:15/רמב"ן על בראשית י״ד:ט״ו

1AND HE DIVIDED HIMSELF, BY NIGHT. Rashi wrote: “In accordance with the plain sense of the verse it means [that they divided into groups] as is the manner of those who pursue their enemies when they flee in different directions. By night means that even after it became dark, they did not cease pursuing them.”The correct interpretation is that he pursued the enemies to Dan during the daytime with his entire army. When it became dark and he was not able to see by which road they fled, he divided his people and servants into two or three groups, taking one part with him, and they pursued them on all roads, smiting them as far as Hobah, which is on the left hand of Damascus. Then he returned from pursuing them. The order of the words [in the verse are thus interpreted as follows]: “And he divided himself, he and his servants, by night.”