Is the source of the voice I heard in my dream, which gave me glad tidings that my prayer for my wife's recovery had been answered, from Satan, especially since it was between sleep and wakefulness?

Charity and supplication are among the spiritual remedies, and we ask Allah that what you saw in the dream is a good omen for your wife's recovery. For a righteous dream is from Allah Almighty, as the Prophet, peace and blessings be upon him, said: "If any of you sees a dream that he likes, then it is from Allah, so let him praise Allah for it and speak of it. And if he sees something else, which he dislikes, then it is from Satan, so let him seek refuge from its evil and not mention it to anyone, for it will not harm him."