The Context and Challenge
The expedition responded to reports (subsequently revealed to be exaggerated) of Byzantine forces massing near the Arabian border — likely in response to the Muslim victories at Mu’ta (629 CE) and the conquest of Mecca (630 CE). The Byzantines were the largest military power of the era; confronting them required the Prophet’s full political authority.
The difficulty: it was the harvest season in Medina (many Muslims were preoccupied with their crops), the journey was 400+ miles each way in summer heat, and the community was still integrating recent converts from the Meccan conquest. The Quran explicitly acknowledges the difficulty: “Go forth, whether light or heavy, and strive with your wealth and your lives in the cause of Allah.” (9:41)
‘Uthman’s generosity: The expedition’s equipment was partly funded by ‘Uthman’s donation of 1,000 camels, 100 horses, and 1,000 gold dinars — earning him the title Ghani al-Jaysh (Provider of the Army) and the Prophet’s statement that nothing he did after this day could harm him.
The Hypocrites and the Genuine Excusers
Surah al-Tawba’s harshest critique was directed at those who stayed behind with false excuses (al-munafiqun). But it distinguished them from those with genuine excuses: the sick, the poor who had no transport, and significantly, the three companions who stayed behind without excuse.
Ka’b ibn Malik and the Boycott (9:118)
Ka’b ibn Malik (one of the most celebrated of the Ansar poets) stayed behind not out of hypocrisy but out of delay and procrastination — he had the means and no illness. When the Prophet returned from Tabuk, Ka’b and two companions (Murara ibn al-Rabi’ and Hilal ibn Umayya) confessed truthfully to the Prophet rather than making excuses.
The Prophet declared a social boycott: for 50 days, no Muslim in Medina spoke to these three. Their wives were separated from them. At day 40, even their portion of the earth felt constricted.
Finally, Allah revealed their acceptance: “And [He also forgave] the three who were left behind [and felt regret] — until the earth was constricted for them despite its vastness and their souls were constricted for them and they were certain that there was no refuge from Allah except in Him. Then He turned to them so they could repent.” (9:118)
See also: Seerah Medina, Sahaba, Tawba, Prophet Muhammad, Seerah Uthman, Jihad