What is the ruling on one who said, in a poetic form and without intending a specific person or mentioning the name of Allah: "I vow to kill you while you are hungry," with the intention of distracting oneself from the whispers (waswas) of purity and prayer that have recently increased?

It appears that what was mentioned is closer to delusion, especially the phrase "I have vowed to kill you while you are hungry" without intention. The person concerned should persist in supplication and humble entreaty, divert themselves from obsessive thoughts, and consult a trusted psychiatrist.