Sallallahu Alayhi Wasallam (PBUH) is the "Salawat" or peace and blessings invoked upon the Prophet Muhammad. It means "May the peace and blessings of Allah be upon him." Muslims are commanded by the Quran to send blessings upon the Prophet, and doing so is a sign of deep love, respect, and gratitude for his role in delivering the message of Islam. Reciting this phrase every time the Prophet's name is mentioned is a source of great spiritual reward and is believed to bring the believer closer to the Prophet's intercession on the Day of Judgment. The Quran explicitly commands: "Indeed, Allah and His angels send blessings upon the Prophet. O you who have believed, ask [Allah to confer] blessing upon him and ask [Allah to grant him] peace" (33:56). This verse establishes the obligation and virtue of sending Salawat upon the Prophet. Sallallahu Alayhi Wasallam is the most common form, though variations exist. The benefits of sending Salawat are immense: the Prophet promised that whoever sends one blessing upon him, Allah sends ten blessings upon that person, erases ten sins, and raises their rank by ten degrees. Salawat also serves as a means for the Prophet to recognize the believer on the Day of Judgment, and it is a form of charity that costs nothing. It is recommended to send Salawat when mentioning the Prophet's name, during the Tashahhud in prayer, on Fridays, and abundantly in general. The Salawat expresses love, gratitude, and connection to the Prophet, acknowledging that through him, humanity received the final guidance. It is a spiritual practice that strengthens faith, increases blessings, and prepares the believer to meet the Prophet in the Hereafter. The abbreviated form "PBUH" (Peace Be Upon Him) is commonly used in English but should ideally be written out fully to fulfill the command of sending complete blessings.