The word "Salat" (prayer) originates from the Arabic root meaning "to bend" and "to incline." It is derived from the words "Sāwāyin," which are two veins in the back. There are many opinions regarding its etymology, most of which are considered invalid. Al-Qadi 'Iyad mentioned several interpretations in his book "Al-Tanbihat," and Al-Tabari, in his explanation of Al-Mukhtasar, stated that the word "Salat" is derived from "Sāwāyin." He further explained that "Sallā 'alayhi" means "he bent towards him and inclined to him," implying an exaggeration of bending and inclining. Therefore, "Sallā Allahu 'alayhi" is a more emphatic and eloquent expression than "Rahimahu Allah" (May Allah have mercy on him). The root of "Salat" is "Hana'," meaning inclination. Thus, the word is used metaphorically to express exaggeration and emphasis. For example, a poet might say, "He inclined towards the child, and bent over him," meaning he showed great affection and care. Similarly, "Sallā 'alayhi" can mean "he prayed for him," implying a prayer of supplication. However, "Salat" does not always mean supplication in general. One would not say "Sallaytu 'ala al-'aduwwi" (I prayed against the enemy), meaning "I supplicated against him." Instead, one would say "Sallaytu 'alayhi" meaning "I inclined towards him with mercy and compassion." The original meaning is inclination, and for this reason, it is used with the preposition "li" (to/for) when referring to supplication, as in "Sallaytu li 'ilmika" (I prayed for your knowledge). However, when referring to supplication against an enemy, the preposition "ala" (upon) is used, distinguishing "Salat" from supplication. Linguists differ on this matter. Some state that "Salat" means supplication in general, without distinguishing between different contexts, and do not mention the use of the prepositions "li" or "ala." Others restrict the usage as we have described. This is the end of the quote from Ibn Hisham. He also stated in Al-Mughni that, in his opinion, the primary meaning of "Salat" in Arabic is "inclination." When this inclination is directed towards Allah, it signifies mercy. When directed towards angels, it signifies seeking forgiveness. When directed towards humans, it signifies supplication. In the verse where the angels are mentioned as supplicating, the word "Salat" refers to seeking forgiveness, and the word "Rahmah" (mercy) is omitted. In the verse where humans are mentioned, "Salat" refers to supplication. The verse "Allah and His angels supplicate for the Prophet" is a testament to the honor and nobility bestowed upon this Ummah (community). It signifies that Allah, His angels, and the believers all supplicate for the Prophet Muhammad (peace be upon him). This is a sign of faith and a confirmation of their connection to him. It is a great honor for this Ummah that Allah informs them that He and His angels supplicate for His Prophet, and then commands them to participate in this act of supplication. They supplicate with them for the Prophet (peace be upon him). The term "Ummi" (unlettered) refers to the obligation of supplication. Al-Hafiz Abu 'Umar ibn 'Abd al-Barr stated that there is a consensus on the obligation of supplication. Al-Qadi 'Iyad and others agreed with this view, perhaps referring to supplication beyond a single instance. However, the consensus is on the obligation of at least one instance of supplication.