and His attributes. We do not swear by any created thing, because the Prophet—may Allah bless him and grant him peace—said: “Whoever wishes to swear should swear by Allah or remain silent.” (1) He also said: “Whoever swears by other than Allah has committed disbelief or associated partners with Him.” (2)
Concerning His words, ﴿And by the promised Day﴾: the promised Day is the Day of Resurrection. Allah Most High has promised it, explained it in His Book, and set forth rational proofs demonstrating that it will inevitably occur. Allah Most High says: ﴿Just as We began the first creation, We shall repeat it—a promise binding upon Us. We will surely do so﴾ [al-Anbiyā: 104].
﴿And by a witness and what is witnessed﴾: The scholars of exegesis have mentioned several views concerning the witness and what is witnessed. They may all be encompassed by saying that Allah swears by every witness and everything witnessed. The witnesses are many. Among them is Muhammad, the Messenger of Allah—may Allah bless him and grant him peace—who is a witness over us, as Allah Most High says: (And We bring you as a witness over these) (al-Nisā: part of verse 41). This nation is also among the witnesses over humanity: (an upright community, so that you may be witnesses over humanity) (al-Baqara: part of verse 143). On the Day of Resurrection, a person’s limbs will testify against him concerning the good and evil he committed, as Allah Most High says: (On the Day their tongues, hands, and feet will testify against them concerning what they used to do). The angels are also among those who will testify on the Day of Resurrection. Thus, everyone who bears truthful witness is included in His words, ﴿And by a witness﴾.
As for ﴿what is witnessed﴾, it is the Day of Resurrection and the tremendous horrors that will unfold therein, as Allah Most High says: ﴿That is a Day for which humanity will be gathered, and that is a Day that will be witnessed﴾ [Hūd: 103]. Allah therefore swears by every witness and everything witnessed.
﴿Cursed were the people of the trench﴾: This sentence is the response to the oath. The word qutila means “they were destroyed.” It has also been said that qatl here means being cursed—that is, being cast out and banished from Allah’s mercy. The people of the trench were disbelievers who burned the believers in fire. Several accounts concerning these people have been related, some pertaining to Greater Syria and others to Yemen. The point is that these disbelievers tried to force the believers to renounce their religion, but they failed, so they dug a trench consisting of pits.