Step 1: Understanding the Concept:
Kriya Yoga is mentioned in the second chapter (Sadhana Pada) of Patanjali's Yoga Sutras.
Step 2: Detailed Explanation:
Sutra 2.1 states: ``tapah svadhyayesvarapranidhanani kriya-yogah''.
- Tapah (Tapas): Austerity, discipline, or heat.
- Svadhyaya: Self-study or study of sacred texts.
- Isvarapranidhana: Surrender to God/Supreme Reality.
These three components together constitute Kriya Yoga.
Step 3: Final Answer:
Kriya Yoga consists of Tapas, Swadhyaya, and Ishwar-pranidhan.