As the people of Madinah were accepting the Noble Prophet (S) in increasing numbers, ‘Abdullah Ibn Ubayy, one of the Jewish elders, became even more envious towards the Noble Prophet (S), and thus planned to kill him.
He invited the Noble Prophet (S), ‘Ali (as) and the other companions for his daughter’s wedding-feast. Meanwhile, he had a huge pit dug up in the courtyard of his house, filled its base with swords, arrows and lances, and had it covered up with a carpet. In addition to this, he poisoned the food and also concealed some Jews, armed with poisoned swords, in the house. His idea was that when the Noble Prophet (S) and his companions walked towards the pit, they would fall into it whereupon the armed Jews would rush out and put them to death. He had poisoned the food so that should this plan fail, they would be killed by means of the poison.
Jibra`il, through the orders of Allah, revealed these two plans which stemmed from jealousy and envy to the Noble Prophet (S) and said to him: “Your Lord says: Go to ‘Abdullah Ibn Ubayy’s house and sit wherever he requests you to sit and eat whatever he presents before you, for I shall suffice you and protect you from his evil designs.”
The Noble Prophet (S), Amirul Mo’minin (as) and the other companions entered ‘Abdullah’s house. ‘Abdullah ushered them to the courtyard of his house. As per his request, all of them sat over the pit but nothing happened, much to ‘Abdullah’s astonishment.
He then ordered the poisoned food to be brought. When it was placed before them, the Noble Prophet (S) told ‘Ali (as) to recite the following over the food: “In the name of Allah, The Healer; in the name of Allah, The Sufficient; in the name of Allah, The Acquitter; in the name of Allah, with Whose name no thing or sickness, in the earth or in the heaven, can cause harm, and He is the All-Hearing, the All-Knowing.”
Then, all of them ate the food and came out of the gathering without being harmed in the slightest. ‘Abdullah’s bewilderment knew no bounds; he assumed that the food had not been poisoned and so ordered the armed Jews to eat it, as a result of which, all of them died.
Meanwhile, his daughter who was the bride, decided to sit down on the carpet covering the pit. As soon as she did so, she plummeted into the pit. Her shrieks filled the air, only to subside with her death.
‘Abdullah ordered his servants not to reveal the cause of all the deaths in the house. When the news of these incidents reached the Noble Prophet (S), he asked the jealous ‘Abdullah what had happened.
“My daughter fell off the roof of the house; as for the others, they died due to diarrhoea,” he replied.( Khazinah al-Jawahir, Page 344; Biharul Anwar, Volume 6 )