Yahya ibn Mu'adh al-Razi

Central Asia, also known as Middle Asia, is a region of Asia that stretches from the Caspian Sea in the west to western China and Mongolia in the east, and from Afghanistan and Iran in the south to Russia in the north. It includes the former Soviet republics of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan, which are colloquially referred to as the "-stans" as the countries all have names ending with the Persian suffix "-stan", meaning "land of". The current geographical location of Central Asia was formerly part of the historic region of Turkestan, also known as Turan.

In Islam, Jannah (Arabic: جَنّة, romanized: janna, pl. جَنّٰت jannāt,lit. "paradise, garden", is the final abode of the righteous. According to one count, the word appears 147 times in the Quran. Belief in the afterlife is one of the six articles of faith in Sunni and Twelver Shi'ism, a place where "believers" will enjoy pleasure, while the unbelievers will suffer in Jahannam. Both Jannah and Jahannam are believed to have several levels, in both cases, the higher the level, the more desirable -- in Jannah the higher the prestige and pleasure, in Jahannam the less the suffering. The afterlife experiences are described as physical, psychic and spiritual. Jannah is described with physical pleasures such as gardens, beautiful houris, wine that has no aftereffects, and "divine pleasure". Their reward of pleasure will vary according to the righteousness of the person. The characteristics of Jannah often have direct parallels with those of Jahannam. The pleasure and delights of Jannah described in the Quran, are matched by the excruciating pain and horror of Jahannam.

Allah is the common Arabic word for God. In the English language, the word generally refers to God in Islam. The word is thought to be derived by contraction from al-ilāh, which means "the god", and is linguistically related to the Aramaic words Elah and Syriac ܐܲܠܵܗܵܐ (ʼAlāhā) and the Hebrew word El (Elohim) for God.

Balkh is a town in the Balkh Province of Afghanistan, about 20 km (12 mi) northwest of the provincial capital, Mazar-e Sharif, and some 74 km (46 mi) south of the Amu Darya river and the Uzbekistan border. Its population was recently estimated to be 138,594.

Nishapur or officially Romanized as Neyshabur is the second-largest city of Razavi Khorasan Province in the Northeast of Iran. Nishapur is situated in a fertile plain at the foot of Binalud Mountain Range and has been the historic capital of the Western Quarter of Greater Khorasan, the historic capital of the 9th-century Tahirid dynasty, the initial capital of the 11th-century Seljuk Empire, and is currently the capital city of Nishapur County and a historic Silk Road city of cultural and economic importance in Iran and the region of Greater Khorasan.