hadith
4252
۞
Imam Ali (AS) said, What good forms of worship Prostration (sujūd) and bowing (rukū) are.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : نِعْمَ العِبادَةُ السُّجُودُ وَ الرُّكُوعُ