ישעיהו מז:יא פירוש: רש״י ואבן עזרא

you shall not know how to remove it by prayer Heb. לֹֹא תֵדְעִי שַׁחְרָהּ. You shall not know to pray about it (Jonathan). Whom will you beseech to extricate you therefrom?

יום רעה═רעה A day of evil.¹⁵A. V., Evil. I. E. supplies יום the day of because of the masculine form of the verb ובא.

to rid yourself of it Heb. כַּפְּרָהּ, to wipe it away and to remove it, and this is every expression of atonement (כַּפָּרָה). It is an expression of wiping and taking away.