וַיִּשְׁלַ֤ח יִשְׂרָאֵל֙ מַלְאָכִ֔ים אֶל־סִיח֥וֹן מֶֽלֶךְ־הָאֱמֹרִ֖י מֶ֣לֶךְ חֶשְׁבּ֑וֹן וַיֹּ֤אמֶר לוֹ֙ יִשְׂרָאֵ֔ל נַעְבְּרָה־נָּ֥א בְאַרְצְךָ֖ עַד־מְקוֹמִֽי׃
И послал Израиль послов к Сихону, царю Аморрейскому, царю Хешбонскому; И сказал ему Израиль: пройди мы, через твою землю, по Моей земле.
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.