The intercession and the conversion
When Sultan Ibrahim Sharqi of Jaunpur marched on Bengal at the saint's own earlier request, Raja Ganesh ("Kans") came in terror to Nur Qutb-ul-Alam and begged him to intercede. The Riyaz gives the saint's reply as direct speech: "The Saint replied: 'In order to intercede on behalf of an oppressive infidel, I cannot stand in the way of a Musalman sovereign, especially of one who has come out at my desire and request.'" When Kans offered to submit to any condition, "The Saint said: 'So long as thou dost not embrace the Musalman religion, I cannot intercede for thee.'"
Kans's wife stopped his own conversion, so he brought his twelve-year-old son Jadu instead: "I have become old, and desire to retire from the world. You may convert to Islam this son of mine, and then bestow on him the kingdom of Bengal." The text continues: "The saint Qutbu-l-'Alam taking out from his own mouth some chewed betel, put it into Jadu's mouth, and making him pronounce the creed of the Musalman faith, converted him to Islam, and naming him Jalalu-d-din, had the fact proclaimed in the city, and caused the Khutba of the kingdom to be recited after his name."
The saint then went to Sultan Ibrahim and asked him to withdraw, since the jihad he had summoned him for was "enjoined against infidels, not against Musalmans" — now that Kans's son had converted. When a court qazi tried to test him and failed, the Riyaz records the saint's own warning to him: "'To view with contempt saints and to try to test them, ends in nothing but discomfiture. Before long, thou shalt die in a wretched plight.'" Sultan Ibrahim returned to Jaunpur and, the text says, both he and the qazi died shortly after.