Ruku (Bowing)
Bowing from the waist during prayer as a sign of humility.
Ruku (Arabic: ركوع) is the act of bowing from the waist with the hands on the knees and the back straight during prayer. Ruku is an obligatory part of each rak'ah and expresses humility and submission to Allah.
During ruku, one says "Subhana Rabbi al-Azim" (Glory be to my Lord, the Almighty) three times. It is important that the back is straight and the head is level with the back — one should neither raise nor lower the head.
After ruku, one rises to the standing position and says "Sami'Allahu liman hamidah" (Allah hears the one who praises Him), followed by "Rabbana wa lakal hamd" (Our Lord, and to You is all praise). This position is called qawmah and is a brief pause before going down into sajdah.
Related terms
Asr (Afternoon Prayer)
The third daily prayer, performed in the afternoon.
Qiyas (Analogical Reasoning)
Legal analogy used to derive Islamic rules for new situations based on established rules.
Laylat al-Qadr (The Night of Decree)
The most sacred night in Islam, when the Quran was revealed.
Salah (Prayer)
The Islamic ritual prayer, performed five times daily.
Tayammum (Dry Purification)
Ritual purification with clean earth, when water is not available.
Isha (Night Prayer)
The fifth and final daily prayer, performed when darkness has fallen.