The Jews who had been expelled from Madinah, had settled in Khaibar. Even here they involved themselves in conspiracies against Islam. They instigated the kuffaar to rise against the Muslims. Thus, the Battle of Khaibar took place in the seventh year to put an end to the mischief of the Jews.
On the 20th or 21st of Muharram, an army of 1,400 Sahaabah set off under the command of Rasulullah (صلى الله عايه وسالم) for Khaibar. All the forts were captured. When the Jews lost all hope, they sued for peace and offered to live in subjection under Muslim domination. They offered to take the Muslims as partners in their farms. Since they were experienced farmers, the Jews offered to do the actual farming while the Muslims would receive a share of the yield. Rasulullah (صلى الله عايه وسالم), being Rahmatul Aalameen (Mercy to the worlds), accepted their offer. Thus were the lives of the Jews spared.
Hadhrat Safiyyah who was the daughter of Hubay Bin Akhtab and of the progeny of Harْn (alayhis salaam) was captured in this battle by the Muslims. Rasulullah (صلى الله عايه وسالم) set her free and conferred on her the honour of being his wife.
The prohibition of mu’tah (temporary marriage) was decreed in this 7th year. Also, was prohibited the meat of asses and of all beasts of prey.
The mother of Hadhrat Aishah (radhiyallahu anha), Hadhrat Umme Rouman passed away during this year.
In accordance with the Treaty of Hudaibiyyah of the 6th year, Rasulullah set off with 2100 Sahaabah to perform the Umrah. In terms of the pledge, they stayed three days in Makkah and returned to Madinah Munawwarah.
On the journey to Makkah, Rasulullah (صلى الله عايه وسالم) married Hadhrat Maimunah. It was his intention to have the walimah feast in Makkah. But the kuffaar would not relent. They refused to extend the 3 day period of grace allowed by the Treaty. The walimah was therefore held at a place called Saraf while returning from Makkah. This was where the Nikah took place and precisely at the spot where the tent was set up, did Hadhrat Maimunah (radhiyallahu anha) die in the year 51.
After the pact at Khaibar, a Jewess sent some poisoned mutton as a gift to Nabi-e-Akram (صلى الله عايه وسالم). His noble character constrained him to accept the gift. As he placed a piece of the meat in his mouth, the meat spoke by the permission of Allah Ta’ala. It said:
“O Rasulullah! Do not eat me. Poison has been added to me.”
He immediately threw down the meat and informed the Sahaabah of the situation. One Sahaabi who had already ate some of the meat, died. The effect of the poison endured in Rasulullah (صلى الله عايه وسالم) for as long as he lived. At the time of death the affect of the poison asserted itself.