Jonah 4:2
And he prayed unto the LORD, and said, I pray thee, O LORD, was not this my saying, when I was yet in my country? Therefore I fled before unto Tarshish: for I knew that thou art a gracious God, and merciful, slow to anger, and of great kindness, and repentest thee of the evil.
Exodus 34:6-7
And the LORD passed by before him, and proclaimed, The LORD, The LORD God, merciful and gracious, longsuffering, and abundant in goodness and truth, Keeping mercy for thousands, forgiving iniquity and transgression and sin,
Jonah's protest quotes the Exodus 34 divine name-proclamation as the reason he fled — he knew the LORD's constitutional character of mercy would cause him to relent from the announced judgment. The Sinai self-disclosure established gracious, merciful, longsuffering, and abundant in kindness as the LORD's constitutional character. Jonah's citation of the Exodus 34 declaration as his reason for disobedience reveals that he understood the covenant character perfectly: the prophet who proclaimed judgment fled because he knew the God whose name is mercy would respond to repentance with precisely the mercy Exodus 34 described.