His most reliable name is ʿAbd Allah ibn Thawb.
Others say his name was ʿAbd Allah ibn ʿAbd Allah.
Yet a third view is that it was ʿAbd Allah ibn Thawāb (1).
Some report him as Ibn ʿUbayd,
and it is also said that his name was Yaʿqūb ibn ʿAwf.
He came from Yemen, having already embraced Islam during the Prophet’s lifetime, and entered Madinah in the caliphate of al-Ṣiddīq (Abū Bakr).
He related hadith from ʿUmar, Muʿādh ibn Jabal, Abū ʿUbaydah, Abū Dharr al-Ghifārī, and ʿUbādah ibn al-Ṣāmit.
Among those who transmitted from him were Abū Idrīs al-Khawlānī, Abū al-ʿĀliya al-Riyāḥī, Jubayr ibn Nufayr, ʿAṭāʾ ibn Abī Rabāḥ, and Shurahbil ibn Muslim—though the last two did not actually meet him—as well as ʿAṭiyyah ibn Qays, Abū Qilābah al-Jarmī, Muḥammad ibn Ziyād al-Alhānī, ʿUmayr ibn Hāniʾ, and Yūnus ibn Maysarah, who likewise did not reach him in person but sent on his authority.
Ismāʿīl ibn ʿAyyāsh said: “Shurahbil ibn Muslim narrated to us:
‘Abū Muslim al-Khawlānī came to Madinah after the Prophet ﷺ had passed away and Abū Bakr had assumed the caliphate.
Shurahbil informed us that al-Aswad (2) claimed prophethood in Yemen and summoned Abū Muslim. He set up a huge fire and then cast Abū Muslim into it, yet it did him no harm.
People said to al-Aswad, “If you do not drive this man away, he will ruin your following.”
So he ordered Abū Muslim to depart. Abū Muslim travelled until he reached Madinah, tethered his mount, entered the mosque to pray, and ʿUmar—may God be pleased with him—caught sight of him and rose…’