Midrasz do Przysłów 24:6

(Pr. 24, 6) For with wise council thou, shalt make war. R. Acha b. Chanina in the name of R. Assi, quoting R. Jochanan, said: "With whom can you fight a war of the Torah? With him who possesses bundles of Mishnayoth." R. Joseph, who was a master in Mishnayoth, applied to himself (Ib. 14, 4) But the abundance of harvests is [only] through the strength of the ox.