expression
leave it to me; I'll take care of it
A confident, slightly old-fashioned set phrase used when offering to handle something. Often heard in service contexts or when someone is volunteering to take charge.
「この書類、誰か処理してくれる？」「お任せあれ！」
"Can someone handle these documents?" "Leave it to me!"
お客様、お荷物はお任せあれ。
Sir/Madam, leave your luggage to me.