Explanation

• Marwan I the fourth Umayyad caliph
• Founder of the Marwanid line
• Father: Al-Hakam ibn Abi al-As
• Mother: Amina bint Alqama
• Reign: 684–685 CE

Additional information 

•  Marwan II (Marwan ibn Muhammad), he was the son of Muhammad ibn Marwan 

Last updated question by NS on 2 MAY 2026

Explanation

• Ali ibn Abi Talib (656 to 661 CE) shifted the capital from Madinah to Kufa.
• This change happened around 657 CE (36 AH) after internal conflicts like the Battle of Jamal.
• Earlier, Madinah was the capital during the first three caliphs.
• He is buried in Najaf.

Last verified on 30-04-2026

Explanation

• The police system was first established by Umar ibn al-Khattab.
• He was the second Caliph (634–644 CE).
• A proper system of law enforcement and public safety was organized.
• He also introduced the Hijri calendar.
• He established systems like Bait-ul-Mal (treasury) and judiciary.

Last verified on 30-04-2026

Explanation

• Battle of Yarmouk: Fought between the Byzantine Empire and Muslim forces under Khalid bin Waleed.
• Dates: August 15 to August 20, 636 AD.
• Location: Near the Yarmouk River.
• Caliphate: During the reign of Hazrat Umar (RA).
• Result: Decisive victory for the Muslims, marking the end of Byzantine rule in Syria.

Last verified on 27-04-2026

Explanation

• The key of Baitullah (Kaaba) was entrusted by the Holy Prophet Muhammad (SAW).
• This event took place after the Conquest of Makkah (8 AH / 630 AD).
• The key was given to Hazrat Usman bin Talha (RA) from the Banu Abd al-Dar family.
• The Prophet (SAW) declared that this trust will remain in his family forever.

Last verified on 28-04-2026