Ādityahṛdayam is a Hindu devotional hymn, dedicated to Āditya or Sūrya, found in the Yuddha Kānda (6.105) of Vālmīki's Rāmāyana. It was recited by the sage Agastya to Rāma in the battlefield before fighting with the Rakshasa king Rāvaṇa. In it, Agastya teaches Rāma the procedure of worshiping Āditya for strength to defeat the enemy.