Isaiah 42:5-21.

The haftorah of this week's reading opens with a statement by "the Almighty G‑d, who created the heavens and stretched them out, who laid out the earth and made grow from it." This echoes the Torah portion's recounting of the creation of the world in six days.

G‑d speaks to the prophet Isaiah, reminding him of his life's purpose and duty, namely that of arousing the Jewish people to return to being a light unto the nations, "To open blind eyes, to bring prisoners out of a dungeon; those who sit in darkness out of a prison."

The prophecy continues with a discussion regarding the Final Redemption, and the song that all of creation will sing to G‑d on that day. G‑d promises to punish all the nations that have persecuted Israel while they were exiled. The prophet also rebukes Israel for their errant ways, but assures them that they will return to the correct path and will be redeemed.

Nutshell for "Machar Chodesh" Haftorah

When Shabbat falls on the day before Rosh Chodesh, the head of the Jewish new month, as is the case this week, we read a special haftorah that begins with the words "machar chodesh" — "[And Jonathan told David,] 'Tomorrow is the new moon...'" instead of the above one.

I Samuel 20:18-42.

David, King Saul's son-in-law, fears that his father-in-law views him as competition for his throne, and wishes to have him killed. David enlists his dear friend Jonathan, Saul's son, to ascertain whether indeed Saul has such evil designs. Together they devise a plan, according to which David will be absent from the monthly new moon feast hosted by Saul. At this feast, Jonathan will discover Saul's true intentions with regards to David. Jonathan and David will then rendezvous at a predetermined meeting point where Jonathan will convey to David whether he should return to the royal household or flee.

When everyone is seated at the royal feast, the king notices David's absence and asks Jonathan for his whereabouts. When told that he has gone to Bethlehem to be with his family, the king becomes furious, telling Jonathan to fetch David as he is condemned to death. "And Jonathan knew that it had been decided upon by his father to put David to death."

Jonathan leaves the royal table in anger. The next morning he travels to David's hiding place and the two separate amidst an emotional farewell, promising each other eternal devotion and friendship.