sutam mrdhe kham vapusa grasantam
drstva sunabhonmathitam dharitrya
amantritas tat-tanayaya sesam
dattva tad-antah-puram avivesa
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Narakasura, the son of Dharitri, the earth, tried to grasp the whole sky, and for this he was killed by the Lord in a fight. His mother then prayed to the Lord. This led to the return of the kingdom to the son of Narakasura, and thus the Lord entered the house of the demon.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
It is said in other Puranas that Narakasura was the son of Dharitri, the earth, by the Lord Himself. But he became a demon due to the bad association of Bana, another demon. An atheist is called a demon, and it is a fact that even a person born of good parents can turn into a demon by bad association. Birth is not always the criterion of goodness; unless and until one is trained in the culture of good association, one cannot become good.