In the Name of Allah, the Most Compassionate, the Dispenser of Grace
The lunar month of Rajab, derives its sacredness from the two most primary sources of Islamic guidance, the Glorious Qur’an and the sublime teachings (sunnah) of the Prophet Muhammad (peace and blessings be upon him).
In the Glorious Qur’an in surah al-Tawbah (Repentance), chapter 9, verse 36, Allah, the Sublime, proclaims:
The number of months with Allah is twelve (in a year), so ordained and decreed by Allah the day He created the heavens and the earth; of these (twelve months) four of them are sacred; that is the way of the upright ever-true religion. So do not wrong your souls by fighting during these (months), but only fight in a united front against those who ascribe divinity to others besides God if they first fight against you collectively. But know that Allah is with those who restrain themselves and always remain conscious and mindful of Him.
In one prophetic tradition (hadith) narrated by the companion, Abu Bakrah (may Allah be pleased with him) and recorded in the hadith compilations of Imams Bukhari and Muslim the Prophet Muhammad (pbuh) is reported to have said the following during a sermon he delivered while performing his farewell pilgrimage: