Perang Parit (Khandaq)

The Battle of the Trench (al-Khandaq) in Shawwal 5 AH was the most dangerous military challenge of the Medinan period — a coalition of approximately 10,000 fighters assembled from the Quraysh, the Ghatafan, and allied tribes, organized largely by Banu al-Nadir leaders who had been expelled from Medina the previous year. The Muslim community fielded approximately 3,000 fighters — outnumbered more than three to one — making open battle impossible. The tactical solution came from Salman al-Farisi, a Persian companion, who proposed a defensive trench across the northern approach — a technique unknown in Arabian warfare. The companions dug for days, with the Prophet ﷺ working alongside them, carrying dirt and stone and tying stones to his own abdomen against hunger as they did. The confederate army arrived and was stopped by the trench — Arabian cavalry could not cross it, nullifying the attackers' numerical advantage entirely. The siege lasted approximately twenty-five days. The greatest internal threat came when Banu Qurayza, the last Jewish tribe remaining in Medina, broke their covenant and began negotiating with the confederates — threatening to open the city to attack from the south. Nu'aym ibn Mas'ud, a newly-converted member of the Ghatafan who secretly became Muslim, sowed distrust between the coalition partners. A fierce wind and bitter cold sent by Allah toppled the confederate camp, extinguished their fires, and made the siege position untenable. Abu Sufyan ordered withdrawal and the coalition dissolved. Surah al-Ahzab (33:9-27) is the Quranic account of the battle. It describes the terror that seized the Muslim community when enemies came from above and below, and the hearts reached the throats (33:10) — and then the divine wind that ended the siege without pitched battle. The battle was the last significant Qurayshi military effort against Medina. Its failure was decisive: the confederate coalition could not be reassembled. Power in Arabia was shifting. The trench tactic — an innovation from Persian military experience introduced to Arabia by Salman al-Farisi — represents something characteristic of the Medinan period: the willingness of the Muslim community to learn from and incorporate knowledge from other civilizations, and the Prophet's ﷺ recognition that divine guidance directs the choice of strategy as much as it governs the outcome of battles. The Prophet ﷺ honored Salman's contribution by saying: 'Salman is one of us, the People of the House' — placing a Persian convert among the Ahl al-Bayt.