Who is meant by the pronoun in «وَهُوَ يَشْهَدُ»?

Al-Ḥārith al-Aʿwar: Narrator Criticism, Variant Reports and Evidence

• Mufaḍḍal, who stands outside the quoted speech
• Al-Ḥārith’s confession
• Al-Shaʿbī testifying about al-Ḥārith
• Jarīr as the listener in the first route