וַיָּשֻׁ֖בוּ מִתּ֣וּר הָאָ֑רֶץ מִקֵּ֖ץ אַרְבָּעִ֥ים יֽוֹם׃
And they returned from spying out the land at the end of forty days.
Targum Jonathan on Numbers
And they returned from exploring the land on the eighth day of the month Ab, at the end of forty days.