Who is intended by "those who believe" in this āyah?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. They are people who were believers in Jesus before Muḥammad was sent. [Ibn ʿAbbās]
2. They are those who believed in Moses and followed his law until Jesus came, then believed in Jesus and followed his law until Muḥammad came. [Al-Suddī]
3. The hypocrites. [Sufyān al-Thawrī]
4. Those who were seeking Islam, such as Quss ibn Sāʿidah, Baḥīrā, Waraqah ibn Nawfal, and Salmān.
5. The believers from this community (ummah).