Does the saying of Jesus (peace be upon him), "You know what is in my soul, and I do not know what is in Your soul," liken his soul to God's soul, and what is the decisive statement on this issue, and is it permissible to say, "God said through the tongue of" one of His prophets?

The verse does not liken Allah to creation; rather, it affirms for Him the attribute of "Self" (Nafs) which He affirmed for Himself or His Messenger. Understanding its meaning depends on referring to previous fatwas. As for the saying, "Allah said through the tongue of" a prophet, it is an incorrect and inverted phrase. The correct saying is, "Allah said, narrating from" that prophet.