Isaiah 51 is the fifty-first chapter of the Book of Isaiah in the Hebrew Bible or the Old Testament of the Christian Bible. This book contains the prophecies attributed to the prophet Isaiah, and is one of the Books of the Prophets. Chapters 40-55 are known as "Deutero-Isaiah" and date from the time of the Israelites' exile in Babylon. This chapter expresses the consolation of the Lord offered to the people of Israel.

The original text was written in the Hebrew language. This chapter is divided into 23 verses.

Some early manuscripts containing the text of this chapter in Hebrew are of the Masoretic Text tradition, which includes the Codex Cairensis (895), the Petersburg Codex of the Prophets (916), Aleppo Codex (10th century), Codex Leningradensis (1008).

Fragments containing parts of this chapter were found among the Dead Sea Scrolls (3rd century BCE or later):

There is also a translation into Koine Greek known as the Septuagint, made in the last few centuries BCE. Extant ancient manuscripts of the Septuagint version include Codex Vaticanus (B; ${\displaystyle {\mathfrak {G}}}$^B; 4th century), Codex Sinaiticus (S; BHK: ${\displaystyle {\mathfrak {G}}}$^S; 4th century), Codex Alexandrinus (A; ${\displaystyle {\mathfrak {G}}}$^A; 5th century) and Codex Marchalianus (Q; ${\displaystyle {\mathfrak {G}}}$^Q; 6th century).

The parashah sections listed here are based on the Aleppo Codex. Isaiah 51 is a part of the Consolations (Isaiah 40–66). {P}: open parashah; {S}: closed parashah.

Cross reference: Matthew 3:9

Sarah is mentioned alongside Abraham; Abraham is described as "the rock from which you [the Israelites] were hewn" and Sarah is described as "the hole of the pit from which you were dug", the latter being a reference to her maternal womb. Abraham was called when he was alone i.e. childless.