एष तेऽग्निर्नचिकेतः स्वर्ग्यो यमवृणीथा द्वितीयेन वरेण । एतमग्निं तवैव प्रवक्ष्यन्ति जनासः तृतीयं वरं नचिकेतो वृणीष्व ॥

ॐ

English Translation

This, O Nachiketa, is your Fire-sacrifice, which leads to Heaven and which you have chosen as your second boon. People will call this Fire by your name. Now, O Nachiketa, choose the third boon. 

ॐ

English Commentary

Oh Nachikêtas, this is the fire leading to heaven that you craved for, by the second boon; and the expression ‘the boon has been granted’ should be supplied by way of concluding what has been said again, people will call this fire by thy name; this is the fourth boon which I granted being delighted with thee; Oh Nachikêtas, demand the third boon. The meaning is that Death considered himself a debtor if that were not granted..

Sri Shankara