The Hildebrandslied (German: [ˈhɪldəbʁantsˌliːt]; lit. 'Lay of Hildebrand' or 'Song of Hildebrand') is a heroic lay written in Old High German alliterative verse. It is the earliest poetic text in German, and it tells of the tragic encounter in battle between a father (Hildebrand) and a son (Hadubrand) who does not recognize him. It is the only surviving example in German of a genre which must have been important in the oral literature of the Germanic tribes.
The text was written in the 830s on two spare leaves on the outside of a religious codex in the monastery of Fulda. The two scribes were copying from an unknown older original, which itself must ultimately have derived from oral tradition. The story of Hildebrand and Hadubrand almost certainly goes back to 7th- or 8th-century Lombardy and is set against the background of the historical conflict between Theodoric and Odoacer in 5th-century Italy, which became a major subject for Germanic heroic legend. The fundamental story of the father and son who fail to recognize each other on the battlefield is much older and is found in a number of Indo-European traditions.