Ustuwaanah Hannanah (The weeping pillar)

This is the most blessed of the pillars in Masjid-e-Nabwi for this was the Prophet’s (ﷺ) place of salah.

On this spot there once used to grow a date palm tree. Before the advent of the mimbar, the Prophet (ﷺ) used to lean on it while delivering the khutbah (sermon). When the mimbar was made the Prophet (ﷺ) used it for the khutbah. ...

It so happened when the change took place, such a bitter sound of weeping was heard from the tree that the whole masjid echoed; and those in the masjid started weeping. The Prophet (ﷺ) then said: “The tree cries because the zikr of Allah was near it, and now that the mimbar is built it has been deprived of this zikr in its immediate vicinity. If I did not place my hand on it, it would have cried till the Day of Qiyamah.”

Afterwards the tree dried up and was buried.