וַיֹּ֤אמֶר יְהוָה֙ אֵלַ֔י רְאֵ֗ה הַֽחִלֹּ֙תִי֙ תֵּ֣ת לְפָנֶ֔יךָ אֶת־סִיחֹ֖ן וְאֶת־אַרְצ֑וֹ הָחֵ֣ל רָ֔שׁ לָרֶ֖שֶׁת אֶת־אַרְצֽוֹ׃
And the LORD said unto me: ‘Behold, I have begun to deliver up Sihon and his land before thee; begin to possess his land.’
Targum Jonathan on Deuteronomy
And the Lord said to me, See, within the space of a sun and a moon I have begun to deliver Sihon and his country into thy hand; begin thou to cast him out, to inherit his land.