Holy Prophet told these purified and immaculate ones (Panjetan) as such:
Whenever the Christians get ready for ‘Mubahila’, I will pray and you all say: Ameen.
On the day of Mubahila, a large number of Muhajirs and Ansars had come
near the place of ‘Mubahila’, but Holy Prophet had departed from his house
with only the four personalities. When he reached the rendezvous he hung his cloak over two trees which had grown besides each other and made a shady place. He stood there with his household members and beloved ones and called the Christians for Mubahila.
When the Christians observed this scene they began to tremble with fear as
Abu Haaris, the Bishop who was overcome by fear and anxiety told the
Christians as such: I see such faces that were they to lift their hands in prayers and ask God to pull out the biggest of the mountains from its place, God would fulfill their demand. Do not engage in ‘Mubahila’ for if you do, then all of us will be annihilated and the scope of punishment will engulf the entire Christians.
Holy Prophet too said:
“I swear by God in whose Hand is my soul, God had spread the shadow of
chastisement over the heads of the Nijranites. If they would have engaged in Mubahila, they would have been metamorphosed into apes and pigs and their entire land would have been filled with fire and God would have destroyed all the inhabitants of Nijran and even its birds resting on top of the trees. Moreover, within less than a year all the Christians would have been destroyed by the divine chastisement.”
MUBAHILA by: Naba Organization