He was well convinced that his could not defeat Drona by Kshatriya might alone, he being very much inferior to him in Brahma (spiritual) power. He therefore wandered over the world to find the rneans of obtaining a son (who could defeat Drona). (Meanwhile) Drona lived at Ahichatra.
क्षात्रेण च बलेनास्य नापश्यत् स पराजयम्। हीनं विदित्वा चात्मानं ब्राह्मण स बलेन तु॥ पुत्रजन्म परीप्सन् वै पृथिवीमन्वसंचरत्। अहिच्छत्रं च विषयं द्रोणः समभिपद्यत॥