Mahabharata 12.3.33

12.3.33

evamuktastu rāmeṇa nyāyenopajagāma saḥ |
duryodhanamupāgamya kṛtāstro'smīti cābravīt || 33 ||

It was for this that I introduced myself to thee as a person of thy own race.' Unto the cheerless and trembling Karna, prostrated with joined hands upon earth, that foremost one of Bhrigu's race, smiling though filled with wrath, answered, 'Since thou hast, from avarice of weapons, behaved here with falsehood, therefore, O wretch, this Brahma weapon shalt not dwell in thy remembrance. Since thou art not a Brahmana, truly this Brahma weapon shall not, up to the time of thy death, dwell in thee when thou shalt be engaged with a warrior equal to thyself! Go hence, this is no place for a person of such false behaviour as thou! On earth, no Kshatriya will be thy equal in battle.' Thus addressed by Rama, Karna came away, having duty taken his leave. Arriving then before Duryodhana, he informed him, saying, 'I have mastered all weapons!'"