Prayer (Salah or Namaz) is the foremost pillar of Islamic worship. In Shia Ja'fari jurisprudence, precise astronomical occurrences dictate the validity of each prayer. This guide addresses common questions: Why do Shia Muslims combine afternoon and evening prayers? How are the prayer windows calculated?
1. The Three Quranic Windows of Prayer
While all Muslims unanimously agree that there are five mandatory daily prayers consisting of 17 Rak'ats in total, the Holy Quran specifically delineates three distinct astronomical time windows:
“Establish regular prayers from the declining of the sun till the darkness of the night, and the morning recitation; indeed, the morning recitation is witnessed.” (Surah Al-Isra 17:78)
Classical commentators note that this verse outlines:
- The Declining of the Sun (Zawal): Covers Dhuhr and Asr prayers.
- The Darkness of the Night (Ghurub): Covers Maghrib and Isha prayers.
- The Morning Recitation (Fajr): The dawn prayer.
2. Why Shias Combine Dhuhr & Asr, and Maghrib & Isha (Jam' bayn al-Salatayn)
Shia Muslims combine Dhuhr with Asr, and Maghrib with Isha, following the authentic Sunnah of the Prophet Muhammad (S.A.W). Both Shia texts (such as Wasail al-Shia) and Sunni canonical compilations confirm that the Prophet frequently combined prayers without any emergency:
Ibn Abbas reported: “The Messenger of Allah (S.A.W) observed the noon and afternoon prayers together, and the sunset and night prayers together without being in a state of fear or on a journey.” When asked why, Ibn Abbas replied: “He did not want to cause hardship to anyone in his community.” (Sahih Muslim, Book of Prayer of Travelers, Hadith 705).
Thus, combining the prayers is a divine mercy (Rukhsa) granted by Allah to ease the practice of faith for working Muslims, students, and busy families.
3. Astronomical Calculation Rules
Fajr (Subh-e-Sadiq)
Begins at true dawn when the horizontal white light spreads across the eastern horizon (typically when the sun is 16° to 18° below the horizon).
Dhuhr & Asr (Zawal)
Begins when the sun crosses the celestial meridian at midday. Dhuhr is recited first, followed immediately by Asr.
Maghrib & Isha (Dhihab al-Humrah al-Mashriqiyyah)
According to Shia Ja'fari Fiqh, Maghrib does not begin simply when the sun disc dips beneath the western horizon, but when the reddish afterglow in the eastern sky passes overhead toward the west (roughly 10 to 15 minutes after sunset).