Nuaym ibn Masud al-Ashjai — The Secret Companion Who Accepted Islam During the Siege of Medina, Then Played the Coalition of Quraysh, Ghatafan, and Banu Qurayza Against Each Other to Break the Battle of the Trench

Context: The Coalition’s Strength and Weakness

The Battle of the Trench was not ultimately decided by combat — it was decided by the coalition’s failure to coordinate and their eventual decision to withdraw. The Prophet’s trench strategy prevented a direct assault. The coalition’s weakness was the inherent mistrust among its three components:

1. Quraysh (from Mecca) — had their own political interests
2. Ghatafan (from Najd) — were motivated partly by a promised reward of Medina’s date harvest
3. Banu Qurayza (in Medina) — had nominally agreed to join the coalition but hadn’t acted

The Deception Operation

Nuaym’s operations against each party were mutually reinforcing:

With Banu Qurayza: “You are in Medina — if the coalition withdraws, you’ll face Muhammad’s retaliation alone. Don’t commit until you have hostages from them as guarantees.”

With Quraysh: “Banu Qurayza are going to demand hostages from you to give to Muhammad as a peace offering. Do NOT give them any hostages.”

With Ghatafan: Same message as to Quraysh.

Result: When Banu Qurayza sent to Quraysh asking for hostages before coordinating the attack, Quraysh suspected exactly what Nuaym had predicted and refused. Mutual suspicion made coordination impossible.

The Prophet’s comment: “War is deception (al-harbu khud’a).” Nuaym’s operation is considered a model of information operations within the lawful scope of warfare.

See also: Seerah Al Miswar Ibn Makhrama, Seerah Jabir Ibn Samurah, Seerah Khandaq, Seerah Early Mecca, Seerah Al Mughira Ibn Shuba