The Mysteries of Saint John the Apostle and Holy Virgin 9

1And I said unto the Cherubim, 'My Lord, shew me the matter of the Angel of Wrath whose eyes drop blood into the fountain.' He said unto me, 'Seest thou the Angel of Wrath? He is the Angel of Famine. If Michael were to cease from the wiping away of his tears [of blood] which he letteth drop, and were to allow them to enter the fountain, the [water thereof] would come to an end and the dew which falleth down upon the earth, and diseases and dissensions would break out, and the land would be smitten with famine.' And moreover, he said unto me, 'There are forty legions of angels, each legion containing ten thousand angels, who sing hymns over the dew until it cometh upon the earth, without any blemish at all in it.'
2After these things he brought me to the Land of Edem (Heb. קֶדֶם). He placed me upon his wing of light, and he brought me to the place where the sun riseth, by the side of the fountain which supplieth water to the four rivers, Phisôn, Tigris, Gêôn (the Nile), and the Euphrates. I saw the Paradise of joy, which was filled with all kinds of trees which bore fruits of all kinds. And I said to the Cherubim, 'My Lord, I would that thou wouldst shew me the tree [of the fruit] whereof Adam ate, and became naked, and God was afterwards wroth with him.' The Cherubim answered and said unto me, 'Thou askest a question which concerneth great mysteries, but I will hide nothing whatsoever from thee. Now therefore, rise up, set thyself behind me, and I will explain to thee everything, and I will shew thee the tree [of the fruit] of which Adam ate.'
See also: Genesis 2:10