و (القسم)

Swearing an Oath

Level 4

The 'Waw of Oath' (القسم بالواو) is a particle used to swear by something majestic. It acts as a preposition, meaning the noun following it must take the genitive case (ending in -i).

How It Works

The Waw al-Qasam is a formal way to swear an oath in Arabic, typically appearing at the beginning of a sentence or a new clause. It is distinct from other uses of the letter 'Waw' in several ways:

  • Grammatical Effect: It functions as a preposition. The noun that follows it (the object of the oath) must be in the genitive case. For example, Wallāhi ends with a kasra.
  • Usage Constraints: It can only be used with explicit nouns (like 'God', 'the sun', 'the dawn'). It cannot be attached to pronouns, whether they are personal pronouns or attached pronouns. A closely related particle is Ta al-Qasam (e.g., تَاللهِ), which is used exclusively with the name of Allah.
  • Multiple Oaths: When swearing by multiple things (e.g., 'By the sun and the moon'), only the first 'Waw' is the particle of oath. Subsequent nouns are joined using the conjunction 'and', though they remain in the genitive case due to coordination.
  • The Response: The statement that follows the oath is called the answer to an oath. If this statement is a positive verbal sentence referring to the future, the emphatic Lām and the emphatic Nūn are obligatory (e.g., Wallāhi la-a’malanna). However, if a separator like sawfa is used, the Nūn must be dropped.
  • Register: While Wallāhi is common in daily speech, swearing by other objects is primarily found in Classical literature and the Quran.

Examples (4)

  1. واللهِ إنَّ الحقَّ مَعَكَ.

    By God, the truth is indeed with you.

    Word by Word: By-God indeed the-truth with-you.

    Here, 'Wallāhi' uses the genitive case. The response starts with 'inna' for added emphasis.

  2. واللهِ لأجتهدَنَّ في دراستي.

    By God, I will surely strive in my studies.

    Word by Word: By-God surely-I-strive-surely in my-studies.

    This shows a verbal response using the emphatic Lām prefix and Nūn suffix on the verb.

  3. واللهِ ما فَعَلتُ ذلكَ.

    By God, I did not do that.

    Word by Word: By-God not I-did that.

    In negative responses, emphatic particles like 'inna' or 'la-' are typically not used.

  4. والفجرِ وليالٍ عشرٍ.

    By the dawn and [by] ten nights.

    Word by Word: By-the-dawn and-nights ten.

    A Quranic example showing the Waw used with a noun other than 'Allah', putting 'al-fajr' in the genitive.

Common Mistakes

  • Using the nominative case (ending in -u) after the Waw of Oath.

    واللهُ سأحضرُ.
    واللهِ سأحضرُ.

    The Waw of Oath is a preposition; the noun following it must be genitive (Wallāhi, not Wallāhu).

  • Using a verb like 'I swear' (أقسم) directly before the Waw.

    أقسمُ واللهِ.
    أقسمُ باللهِ.

    The Waw of Oath cannot be preceded by a verb of swearing. If you use a verb, you must use the preposition 'bi-' instead.

How It Connects

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و (القسم)Level 4Swearing an Oath

Learn This First

To learn swearing an oath with 'waw', you need to understand that this specific 'waw' functions as a preposition, placing the following noun in the genitive case. Additionally, oaths are almost always followed by an 'answer' that uses specific emphatic tools like 'inna' or the emphatic 'la-' prefix to complete the meaning.

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