For the phrase “O Death, where are your plagues? O Sheol, where is your destruction?” see 1 Corinthians 15:55.
Note that this quote in the New Testament is not taken from the Hebrew Bible but from the Greek Septuagint (LXX) which translates into English as “O Death, where is your sentence? O Hades, where is your goad?” (Translation by NETS — for the Greek version see the title’s tooltip)