Комментарий к Берешит 2:6

ואד יעלה AND A MIST WENT UP — This has reference to the creation of Adam: viz., He caused the deep to rise and filled the clouds with water to moisten the dust, and man was created. It is like a kneader of bread who first pours in water and afterwards kneads the dough — similarly here: He first watered the ground and afterwards He formed man (Genesis Rabbah 14:1).

ואד יעלה מן הארץ, on the day they were completed, i.e. at the end of the sixth “day” a vapour rose from the earth equivalent to beneficial dew which irrigated the earth and enabled it to bring forth further vegetation without the help of rain or man’s labour.

ואד יעלה מן הארץ, “vapour would rise from the earth, etc.” According to Rashi these words refer to the fashioning of man, G’d, so to speak, used the moisture called אד to make a kind of dough of the mixture of earth and these vapours, allowing Him to fashion and mould man in the shape He had intended for him. According to the plain meaning of the text it appears that seeing the Torah writes that at that time no rain had yet descended on earth, there was no point to rain descending until man had been created who would till the ground after the rain had fallen. The Torah therefore describes that vapours from the earth could keep the plants alive even in the temporary absence of man to tend to them.