Nob was a place in ancient Israel in the vicinity of Jerusalem. It may have been located close to Bahurim, near the Mount of Olives or possibly further north at Tell Shuafat. It likely belonged to the Tribe of Benjamin, Jerusalem being at the border between the tribes of Benjamin and Judah.
In the Bible, Nob is where David fled to the high priest Ahimelech, and where he received the sword of Goliath, which was kept (1 Samuel 21:1-9). Later Saul had Doeg the Edomite brought to him at Gibeah from Nob. (1 Samuel 22:6, 11) Saul was angry with Ahimelech for helping David, and Doeg put Ahimelech and the other priests to death, before killing all the men, women, children and animals of the town. (1 Samuel chapters 21 and 22)
Nob is mentioned later in the Bible in connection with Assyria attacking Israel (Isaiah 10: 24,32), and after the Babylonian Exile (Nehemiah 11:31,32).