Shiva Purana
अन्यथा सोऽहमित्यत्र विपरीतार्थभावना ॥ अहंशब्दस्तु पुरुषस्तदिति स्यान्नपुंसकम्॥ एवमन्योन्यवैरुध्यादन्वयो नभवेत्तयोः ॥ ५ ॥
Otherwise, in that I am, there is a feeling of the opposite meaning. The word ego, however, is the male and that is the neuter. Thus, because of their mutual contradiction, there is no consequence between the two.
english translation
anyathA so'hamityatra viparItArthabhAvanA ॥ ahaMzabdastu puruSastaditi syAnnapuMsakam॥ evamanyonyavairudhyAdanvayo nabhavettayoH ॥ 5 ॥
hk transliteration by Sanscript