The following incident took place with the king Nooruddin Mahmood Zinki, may Allah’s mercy be upon him, in the year 557 after Hijrah. He was ruling Greater Syria at that time and he saw a magnificent dream which made him go to the city of Madinah in a hurry.
Nooruddin saw the Prophet Muhammad (sallallaahu 'alaihi wa sallam) three times in one night and each time the Prophet Muhammad (sallallaahu 'alaihi wa sallam) was telling him "O’ Mahmood! Save me from these two individuals," while pointing towards two blond individuals in front of him. The king then summoned his minister before dawn and told him about his dream. The minister said, "This is a matter which may be taking place in Madinah, the Madinah of Prophet Muhammad (sallallaahu 'alaihi wa sallam)."
Nooruddin Mahmoud Zinki prepared himself, and quickly hastened over 1000 mounts and horses, and other than that. Finally he reached Madinah; as he entered it, he entered quietly and secretly with his minster. He then came to Prophet Muhammad's (sallallaahu 'alaihi wa sallam) Masjid not knowing what to do. The minister then said, "Would you recognize those two individuals if you saw them?" He said, "Yes", so he summoned the people to give them charity and to distribute huge amounts of gold and silver to them and said that no one in Madinah should stay behind but must come to receive the charity.
Out of everyone in Madinah, only two people didn’t come to collect the Sadaqah and instead remained close to the Prophet's masjid. These two men were from Andulus (currently Spain) and stayed in the Prophet's Masjid, in a place that faced the Qiblah from the side of the apartment of Prophet Muhammad (sallallaahu 'alaihi wa sallam) - close to the house of 'Umar Ibn Al Khattaab. When Nooruddin heared of this he summoned them to come for their share of the Sadaqah, they refused and said, “What we have is sufficient. We don’t accept anything”.
Nooruddin stressed and insisted that they must come and so they were brought. When the minister saw them, he said to Nooruddin, "Are these the same individuals?" Nooruddin turned to the men asked them a bit about who they were and what brought them there. They replied, “We came to be close to the Prophet Muhammad (sallallaahu 'alaihi wa sallam).”
He said to them that they must speak the truth and repeated the question several times until they confessed that they were Christians and that they were on a mission to remove the body of the Prophet Muhammad (sallallaahu 'alaihi wa sallam), in agreement with their associates.
He found that they had dug a tunnel from the side of the Qiblah, by the wall of the masjid in the direction of the Prophet Muhammad's (sallallaahu 'alaihi wa sallam) apartment and they collected the dust of the soil in a well inside their residence.
He then beheaded them outside the Masjid and returned to Ash-Shaam. He commanded that the area around the Prophet Muhammad's (sallallaahu 'alaihi wa sallam) site of burial be dug and that lead be poured into it, so as to prevent anyone from reaching Prophet Muhammad's (sallallaahu 'alaihi wa sallam) site of burial ever again.