Harith b Abi Rabi'ah and 'Abdullah bin Safwan both went to Umm Salamah, the Mother of the Faithful, and they asked her about the army which would be sunk in the earth, and this relates to the time when Ibn Zubair (was the governor of Makkah). She reported that Allah's Messenger ( صلی اللہ علیہ وسلم ) had said that a seeker of refuge would seek refuge in the Sacred House and an army would be sent to him (in order to kill him) and when it would enter a plain ground, it would be made to sink. I said: Allah's Messenger, what about who was forced to join them?? Thereupon he said: He would be made to sink along with them but he would be raised on the Day of Resurrection on the basis of his intention. Abu Ja'far said. 'This plain ground means the plain ground of Madinah.

This hadith has been narrated on the authority of 'Abdullah bin Rufai, with the same chain of transmitters (but with the addition of these words):"When I met Abu Ja'far I told him that she (simply) meant the plain ground. Thereupon Abu Ja'far said: No, by God, she meant the plain ground of Madinah.