Allah, Exalted be He, says about it:
“The months with Allah is twelve in number in the Book of Allah, the day He created the heavens and the earth; four of them are sacred. That is the right religion, so do not be unjust to yourselves during these months. “(Quran 9/35).
” They ask you about the fact of making war in the Prohibited Month. Say: “Fighting therein is a grave sin, but graver with Allah is to impede the path of Allah, to deny Him one and the Sacred Mosque, and drive out its inhabitants. “(Qur’an 2/217).
” O you who believe! Violate not the rites of Allah, or the sacred month, nor sacrificial animals nor the garlands, nor those heading to the sacred House seeking from their Lord grace and pleasure. “(Quran 5/2).
” sacred month for the holy month, and all things sacred (compensate) by the law of retaliation. So anyone who assaults you aggress it by making the favor. Fear Allah and know that Allah is with the righteous. “(Qur’an 2/194).
the Sunna whose role is to clarify what was said briefly in the Qur’an and detail its laws and precepts made ​​clear names sacred month as shown in the following hadith:
According to Abu Bakra the Prophet (peace and blessings be upon him) held a long sermon at the Pilgrimage of Farewell in which he said: “the weather made ​​a turn for return as the day when Allah created the heavens and the earth; one year is twelve months of which four are sacred. Three of them succeed: Dhoulq’ida, Dhul-Hijjah, Muharram. The fourth is Rajab of (the tribe) Mudhar, this is the month that is between Jumada and Sha’ban. ”
This hadith proves unambiguously that the sacred four months are: Dhoulq’ida, Dhul-Hijjah, Muharram and Rajab course.