The Sahifa al-Sajjadiyya (صحیفۂ سجادیہ) is a foundational work of supplications attributed to Imam Ali ibn Husayn Zayn al-Abidin (d. 713 CE), the fourth Shia Imam. Composed of intimate, theologically rich prayers and devotions, it addresses themes of tawhid (Divine unity), repentance, human frailty, social ethics, spiritual purification, and the seeker’s relationship with God. The text is prized for its eloquent language, spiritual depth, and practical guidance on moral conduct and inner transformation.