Layth calls upon his Lord with faulty grammar;
For that reason, when he calls Him, He does not answer.1

Therefore, anyone who supplicates should avoid grammatical errors in supplication if he is able to do so. Otherwise, Allah—Glorious and Exalted—is not one to burden any soul beyond its capacity.

Shaykh al-Islām Ibn Taymiyyah—may Allah have mercy on him—was asked about a man who made a grammatically incorrect supplication, whereupon another man told him, “Allah does not accept a grammatically incorrect supplication.”

He—may Allah have mercy on him—replied as follows:

“Whoever makes such a statement is sinful and contradicts the Book, the Sunnah, and the way of the Salaf. As for one who supplicates to Allah with sincere devotion to Him, making a permissible supplication, Allah hears him and answers his supplication, whether his speech is grammatically correct or not. The statement just mentioned has no basis. Indeed, if speaking with correct grammatical inflection is not a person’s normal practice, he should not force himself to do so. One of the Salaf said, ‘When grammatical precision enters, humility departs.’ This is similar to the dislike of contrived rhymed prose in supplication; if it occurs without contrivance, there is nothing wrong with it. Supplication originates in the heart, and the tongue merely follows the heart.

“Whoever makes correcting his speech his chief concern while supplicating weakens his heart’s devotion. This is why someone in desperate need supplicates from his heart with words opened up to him that had never occurred to him before. Every believer experiences this within his heart. Supplication may be made in Arabic or in another language. Allah—Glorified is He—knows the supplicant’s intention and what he seeks, even if his speech is not grammatically correct. He knows the clamor of voices in all their differing languages and the full variety of their needs.”2.