Bi Qiang Zi Bao
9. Bi Qiang Zi Bao? （彼强自保） - Take precautions against the opponent's strength
The proverb here is referencing mamori, and not ukeru which is pure reactionary defence. Ishida's joseki dictionary] describes in the following diagram as mamori.
protects against an invasion at a. After a long discussion of the variations that arise as the result of this invasion, Ishida writes that defends against it. If White nevertheless invades at a, Black responds with b.