Exodus 13:17

ויהי בשלח פרעה... ולא נחם AND IT CAME TO PASS WHEN PHARAOH HAD SENT [THE PEOPLE AWAY] THAT GOD GUIDED THEM NOT — The word נחם means He guided them, just as, (Exodus 32:34) “Go, guide (נחה) the people”, and (Proverbs 6:22) “when thou goest it shall guide (תנחה) thee”. כי קרוב הוא BECAUSE IT WAS NEAR, and it would therefore be easy to return by the same route to Egypt. — Of Midrashic explanations there are many (cf. Mekhilta). בראתם מלחמה WHEN THEY SEE WAR — For instance the war mentioned in (Numbers 14:45) “Then the Amalekites and the Canaanites came down etc.” If they had proceeded by the direct route they would have then turned back. This is evident, for what would have been the case? If, when He led them about by a circuitous way, they said, (Numbers 14:4) “Let us appoint another chief and go back to Egypt”, had He led them by a direct route how much the more certainly would they have spoken so. פן ינחם PERADVENTURE [THE PEOPLE] REPENT — peradventure they cherish a different thought (they change their mind) about having gone out and set their hearts on returning (cf. Rashi on Genesis 6:6).

וַיְהִ֗י בְּשַׁלַּ֣ח פַּרְעֹה֮ אֶת־הָעָם֒ וְלֹא־נָחָ֣ם אֱלֹהִ֗ים דֶּ֚רֶךְ אֶ֣רֶץ פְּלִשְׁתִּ֔ים כִּ֥י קָר֖וֹב ה֑וּא כִּ֣י ׀ אָמַ֣ר אֱלֹהִ֗ים פֶּֽן־יִנָּחֵ֥ם הָעָ֛ם בִּרְאֹתָ֥ם מִלְחָמָ֖ה וְשָׁ֥בוּ מִצְרָֽיְמָה׃

And it came to pass, when Par῾o had let the people go, that God led them not through the way of the land of the Pelishtim, although that was near; for God said, Lest the people repent when they see war, and they return to Miżrayim: