Expedition to Tabuk

The Prophet ﷺ led 30,000 Muslims on the longest and most difficult expedition, marching to Tabuk near the Byzantine frontier in the scorching heat of summer. Reports indicated a massive Byzantine force was assembling to invade Arabia. The hypocrites made excuses to stay behind, and three sincere companions (Ka'b ibn Malik, Murarah ibn al-Rabi, Hilal ibn Umayyah) were boycotted for 50 days for their failure to join without excuse. No battle occurred as the Byzantine forces withdrew, but the expedition demonstrated Muslim military reach.