Shubha is an Islamic term which refers usually to arguments against or criticism of Islam. More precisely, it can point to difficulties perceived in Qur'an

Qur'an

The Quran , also transliterated Qur'an, Koran, Alcoran, Qur’ān, Coran, Kuran, and al-Qur’ān, is the central religious text of Islam, which Muslims consider the verbatim word of God . It is regarded widely as the finest piece of literature in the Arabic language...

 or Islam

Islam

Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...

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In Qur'an

A derived term with similar meaning is mentioned in the Qur'an at 3:7.

It is He Who has sent down to you the Book. In it are Verses that are entirely clear, they are the foundations of the Book; and others not entirely clear. So as for those in whose hearts there is a deviation (from the truth) they follow that which is not entirely clear thereof, seeking Al-Fitnah (polytheism and trials, etc.), and seeking for its hidden meanings, but none knows its hidden meanings save Allâh. And those who are firmly grounded in knowledge say: "We believe in it; the whole of it (clear and unclear Verses) are from our Lord." And none receive admonition except men of understanding.

In Hadith

Hadith

The term Hadīth is used to denote a saying or an act or tacit approval or criticism ascribed either validly or invalidly to the Islamic prophet Muhammad....

Commenting on the above verse, the Prophet is reported to have said:

«فَإِذَا رَأَيْتِ الَّذِينَ يَتَّبِعُونَ مَا تَشَابَهَ مِنْهُ؛ فَأُولئِكَ الَّذِينَ سَمَّى اللهُ، فَاحْذَرُوهُم»

(When you see those who follow what is not so clear of the Qur'an, then they are those whom God described, so beware of them.)