ישעיהו מט:ח פירוש: רש״י ואבן עזרא

In a time of favor In the time of prayer, when you seek My favor and appease Me.

בעת רצון עניתיך In an acceptable time I have heard thee. This expression is likewise a proof of the correctness of my opinion.¹¹See preceding note. The meaning of the phrase according to I. E. is: In the time of favour, viz., for the Israelites, when their redemption was prepared, I have also heard thee, the prophet, and decreed to cause thee to be honoured by all. Many, in opposition to the context, refer the pronoun thee to Cyrus. R. Moses thinks that the preposition ב in בעת רצון has the same meaning as in במרחב יה (Ps. 118:5), namely: with. It is not at all unlikely that his opinion is right.

and on a day of salvation When you need salvation.