וַיִּשְׁלַ֤ח יִשְׂרָאֵל֙ מַלְאָכִ֔ים אֶל־סִיח֥וֹן מֶֽלֶךְ־הָאֱמֹרִ֖י מֶ֣לֶךְ חֶשְׁבּ֑וֹן וַיֹּ֤אמֶר לוֹ֙ יִשְׂרָאֵ֔ל נַעְבְּרָה־נָּ֥א בְאַרְצְךָ֖ עַד־מְקוֹמִֽי׃
Et Israël envoya des députés à Sihôn, roi des Amorréens, qui régnait à Hesbon, et il lui fit dire: "Laisse-nous traverser ton pays pour gagner notre destination."
Siftei Chakhamim
With the land of Moav. Subsequently it is written (Shoftim 11:19), “Then Yisroel sent messengers to Sichon…” implying that initially their journey around was from west to the east, at the southern side of Edom and Moav. Then, when they reached the southeastern edge, they turned northward to go around the eastern border of Moav. Once they had gone around the eastern border, it is written afterwards, “Then Yisroel sent…” for they had reached the land of Sichon and Og.