וַיִּ֤פֶן אַבְנֵר֙ אַֽחֲרָ֔יו וַיֹּ֕אמֶר הַאַתָּ֥ה זֶ֖ה עֲשָׂהאֵ֑ל וַיֹּ֖אמֶר אָנֹֽכִי׃
Then Abner looked behind him, and said: ‘Is it thou, Asahel?’ And he answered: ‘It is I.’
Read midrashic interpretation of II Samuel 2:20: and classical rabbinic exegesis.