Ali (A.S.) stooped him and said, "O' Qambar remain silent, for verily the person will suffer because of our silence. Gain Allah a happiness by your silence and let the person fall prey to the mischief of Shaitaan. I swear by the Lord who split open the seed to grow plant from it, and who created human beings, that no other quality of a believer is more dear and who pleasing to Allah than controlling one's temper, and no other quality of a believer is disagreeable to shitaan than it. For verily silence all friends and foes alike praised khwaja Naseer. Jurji Zaidan in the translation of Uadabul Lughattul Arabiyah writes that, "khwaja Naseeruddin Toosi's libray contained four lac books, and he was a master in the field of Astrology and philosophy. He had under his care many endowment (waqf) properties of the mongols, in short he was a tower of light in the darkness of this world".
I have discussed about the life of this great personality in my book ufawaede Razawiyah that his family was related to the uwasharah family of the kings of Jahrood, situated at distance of 10 Farsakh from Qum. Khwaja Naseeruddin Toosi was born in Toos on 11 Jamadi ul Ula 597 A.H./ 1201 A.D. and died on Sunday 18 zilhaj 672 A.H. /1274 A.D. in kazmayn. It is engraved on his grave: "while their dog (lay) out stretching it's paws at the entrance".(Surah-al kahf: 18).