On the other hand, according to Ibn-e-Sa‘d, Hazrat Utbah (ra) was 40 years old at the time of migration towards Medina. In any case, when he returned to Mecca from Abyssinia, the Holy Prophet (sa) was still residing in Mecca and he stayed with the Holy Prophet (sa). He migrated to Medina along with Hazrat Miqdad (ra) bin Aswad. Both of these companions were from among the early converts to Islam.
(Usdul Ghabah, Vol. 5, p. 129, Murarah bin Rabi‘ (ra), pp. 558-559, Dar-ul-Kutub al-Ilmiyyah, Beirut, 2003) (Al-Tabaqaat-ul-Kubra li ibn Sa‘d, Vol. 3, p. 72, Min Hulafa-e-Bani Naufal bin Abd Manaf, Dar-ul-Kutub al-Ilmiyyah, Beirut, 1990) (Imta‘ul Isma‘, Vol. 6, p.331, Fasl Fi Dhikr Mawali Rasulillah(sa), Beirut, 1999)
The incident of their migration to Medina is as follows:
Hazrat Utbah (ra) bin Ghazwan and Hazrat Miqdad (ra) bin Aswad departed with the army of the Quraish, and they intended to join the Muslims. The Messenger (sa) of Allah dispatched a Muslim army under the command of Hazrat Ubaidah (ra) bin Harith towards Thaniyat-ul-Marah, which is situated almost 55 kilometres northeast from the city of Raabigh and approximately 200 kilometres from Medina. The army of the Quraish was under the command of Ikrimah bin Abi Jahal. They did not engage in any battle except for one arrow which was fired by Sa‘d (ra) bin Abi Waqas and this was the first arrow shot in the way of Allah. On that day, Utbah (ra) bin Ghazwan and Hazrat Miqdad (ra) fled and joined the Muslims.
(Atlas Siratun Nabawi, Siryah Ubaidah bin Harith, p. 196, Maktabah Darul Islam) (Al-Isti‘ab, Vol. 4, pp. 1480-1481, Miqdad bin Aswad, Dar-ul-Jeel, Beirut)