"Indeed, Allah, Majestic and Exalted, appointed a king for everything. He made the king of greenery (Khudra) the Myrtle. He took the Covenant (Ahd) from all of it and entrusted it to the Myrtle. So everything of greenery changes, fades, and alteration occurs within it; but the Myrtle remains by the Covenant in which it is, neither changing nor altering from its meaning (Ma'na)."
And it was narrated that our Master, the Commander of the Faithful (Amir al-Mu'minin), may His Might be exalted, was gifted on the day of Nowruz a silver goblet (Jam) 1 filled with Khabis 2 . He said: "What is this?"
They said: "This is the day of Nowruz, and gifts are recommended in it." He said: "Do you have a like of it in the year?" They said: "The day of Mihrajan."
He said: "Make Nowruz (Nawrizu) and make Mihrajan (Mahriju) every day if you are able." He ate the Khabis and distributed the vessels among his companions.
And it was narrated from Abu al-Khattab, to him belongs submission, that he said:
"'Ruz' in Persian is safety from Metamorphosis (Massukhiyya)."