Reference for Berakhot 85:19

אמר ר' אדא בר אהבה האי כשרתא מברכין עלויה בורא עצי בשמים אבל משחא כבישא לא ורב כהנא אמר אפילו משחא כבישא אבל משחא טחינא לא נהרדעי אמרי אפי' משחא טחינא

Rab Adda b. Ahabah said: Over costum the benediction is "...Who createst fragrant woods," but not over the oil in which it is steeped. Rab Kahana said : [That is the benediction] even for the oil in which it is steeped, but not the oil with which it is ground. The men of Nehardea said : [That is the benediction] even for the oil in which it is ground.

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