Why was this name given to the tree?
In Sahih Muslim it is recorded that Rasulullah(sallallahu alaiyhi wassallam) said: "Every order of Allah that descends from above, comes to an end there, and every deed of man which rises from the earth towards the heavens, comes to a halt at this point. " In other words, whenever an order of Allah is issued, it first stops there before descending upon the earth, and the deeds of man from below first stop there and are then lifted above.
It has already been mentioned that Rasulullah(sallallahu alaiyhi wassallam) said that it was adorned with objects of such resplendent beauty that none of the creation of Allah Ta'ala is able to describe its absolute elegance and splendour. Another Hadith, describes that it was bedecked with golden moths.(Sahih Muslim Vol.1). Concerning this tree, it has also been mentioned in the Hadith that it is so huge that a rider could ride for up to hundred years under the shade of its branches, or that a hundred horsemen are able to roam under its shade. (Mishkaat p. 498)
ENTERING JANNAH AND BEHOLDING THE RIVER OF KAUSAR
Hadrat Anas bin Maalik (Radiallahu anhu) reports that Rasulullah(sallallahu alaiyhi wassallam) said,"While walking in Jannah, I suddenly found myself along a river. On both its banks were domes of pearls that were empty in the centre (i.e. the whole dome consisted of just one pearl). I asked Jibraeel (Alaihis salaam) what this was and he replied that it was the river of Kausar which Allah has bestowed upon me. When I took a closer look at it, I noticed that the soil (beneath the water), was an immensely fragrant musk." (Sahih Bukhaari)
THE PURE HEART OF NABI (sallallahu alaiyhi wassallam) WASHED WITH ZAM ZAM IN A GOLDEN TRAY
In the Ahaadith on the incident of Mi'raaj, it has also been recorded that the blessed chest of Nabi(sallallahu alaiyhi wassallam) was opened, and his heart removed and washed in the water of Zam Zam, and then replaced and restored to its original condition. In today's modern, scientific age, when the practice of surgery has become an ordinary everyday occurrence, this is not at all difficult to believe. And since Zam Zam was used to wash the noble heart of Rasulullah(sallallahu alaiyhi wassallam), we can clearly understand the merit and excellence of this water. The Hadith also mentions that the heart of Nabi(sallallahu alaiyhi wassallam) was filled with Imaan, and Hikmah (wisdom). What this means, is that the overwhelming power of Imaan in Rasullullah(sallallahu alaiyhi wassallam) and the wisdom in his heart was reinforced and enhanced in order to fortify him with strength and power required for his magnificent journey into the heavens.