4Q240 ( or 4QCanta) is believed to be a commentary (or pesher) on the Song of Songs, also known as 'Canticles'. Written in Hebrew, it was found in Cave 4 at Qumran in the West Bank and comprises part of the Dead Sea Scrolls. From its palaeography (script) it has been identified as being early-Herodian.
References
4Q240 Wikipedia(Text) CC BY-SA