Supplication (also known as petitioning) is the most common [source?] form of prayer, wherein a person asks God to provide something, either for the person who is doing the praying or on behalf of someone else. This is because a supplication is being made, also known as intercession.

The concept of supplication is also perfectly at home in a secular context. The supplicant may also be described as a suppliant, but the former word is more commonly used. The key meaning is of a request by the lesser person in an acknowledged unequal relationship. For example, supplication is the final stage of thesis submission at Oxford University. Supplication is also closely associated with the secular notion of appeasement.

In Christianity, the prayer of supplication for health by and on behalf of the sick is referenced in early Christian writings in the New Testament, especially James 5:13-16.

One example of supplication is the Catholic ritual of novena (from novem, the Latin word for "nine") wherein one repeatedly asks for the same favor over a period of nine days. This ritual began in Spain during the Middle Ages when a nine-day period of hymns and prayers led up to a Christmas feast, a period which ended with gift giving. A contemporary Christian example of supplication is the practice of the Daily Prayer for Peace by the Community of Christ where a member prays for peace each day at a specified time. Philippians 4:6 says, "Be anxious for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God."

Sami Yusuf is a British singer-songwriter, composer, producer and multi-instrumentalist musician of Azerbaijan origin.

In 2003 Yusuf released his first album "Al-Mu`allim" at the age of 23, selling over two million copies. Following the release of his second album "My Ummah" in 2005, Yusuf was heralded as "Islam's Biggest Rock Star" by Time magazine for his success in attracting a relatively young fan base from diverse regions across the world, many of whom were of Muslim backgrounds. Yusuf has sold over 9 million albums. In October 2010, following a five-year hiatus, Yusuf’s third official album "Wherever You Are" was launched, manifesting his self-coined genre “Spiritique”. Yusuf is involved in humanitarian initiatives, supporting, among others, Islamic Relief and Save the Children.

Nouman Ali Khan is a Muslim speaker and the CEO and founder of Bayyinah, an Islamic educational institution in the United States.

His early education in Arabic started under in Riyadh, Saudi Arabia and continued in Pakistan. His serious Arabic training began in 1999 in the United States. He has been teaching Modern Standard and Classical Arabic at various venues for several years with over 10,000 students nationwide. Nouman Ali Khan teaches about the religion of Islam through his video speeches. He also frequently speaks at Islamic Circle of North America Conventions about Islam, family, and other life topics.