It is obligatory upon all Mukallafs (persons meeting the conditions to be held legally accountable for their actions), be jinn or man; the Arabs and nonArabs, men and women, poor and rich, rulers and subjects, during and after the lifetime of the Prophet (peace be upon him) until the Day of Resurrection to worship Allah alone, applying His Laws and following the guidance of Prophet Muhammad in words, deeds, and creed.
This is the duty of all Muslims towards Islam. They must worship Allah (Exalted be He), obey Him, follow His Laws, revere His orders, and abandon what He has prohibited. `Ibadah (Worship) means obeying Allah in love, sincerity, and desire. Among His orders are the performance of Salah and Hajj, paying Zakah, being dutiful to the parents, maintaining good ties with kinships, striving in the Cause of Allah with money and self, and telling the truth. Meanwhile, we should abandon what He has prohibited including Shirk (associating others with Allah in His Divinity or worship). Shirk involves the devotion of all or some acts of `Ibadah to anything else other than Allah (Exalted be He) such as the Jinn, prophets, angels, or the occupants of the graves. Whoever beseeches, offers vows or sacrifices to, seeks the help of them commits major shirk which is a major sin. Therefore, his Shahadah (Testimony of Faith) becomes Batil (null and void), because "La ilaha illa Allah (there is no deity but Allah) is the word of Tawhid (monotheism), which is the cornerstone of Din (religion) of Islam. Whoever supplicates to, seeks the help of, and offers sacrifices to idols and the dead has negated this word and committed major Shirk.
Whoever worships, supplicates to, seeks the help of, and offers sacrifices to the dead, idols, Jinn, prophets, messengers, angels, or believes that they can heal the sick, grant them provision or victory over their enemies has negated the saying that there is no deity but Allah and His saying, You (Alone) we worship, and You (Alone) we ask for help (for each and everything). and contradicted His saying, And they were commanded not, but that they should worship Allâh, and worship none but Him Alone (abstaining from ascribing partners to Him) Every Muslim should know that what some ignorant people do at graves such as asking the inhabitants of the graves to heal the sick or grant them victory over the enemies or believing that they know the Unseen is a form of the major Shirk and the religion of Jahiliyyah (preIslamic time of ignorance). We ask Allah (Exalted be He) for safety from this.
It is also necessary, after believing in the Tawhid, being sincere to Him, and beware of disbelief, to must testify that Muhammad is the Messenger of Allah. The two Shahadah (Testimony of Faith) form the cornerstone of Islam. Every Mukalaf has to believe that Muhammad (peace be upon him) is the slave and Messenger of Allah who was sent to mankind and Jinn. He is Muhammad ibn `Abdullah ibn `Abdul Muttalib A lHashemy, the Arab prophet who was born in Makkah and migrated to Madinah. He is the seal of the prophets. It is obligatory upon man and Jinn to sincerely believe in the Messenger (peace be upon him) through words, actions and beliefs. A Muslim must obey Allah's commands including performing Salah, observing Sawm (Fast), performing Hajj, and paying Zakah. He also must avoid the prohibitions such as Shirk, showing ingratitude to parents, severing ties of kinship, Zina (adultery), theft, Khamr (intoxicant), dealing in Riba (Usury), and devouring the orphan's property unjustly, and so on.
O servant of Allah, be assured of these two testimony by obeying the commands and avoiding the prohibitions, for this Allah's due right and the right of his Messenger upon you.
You must worship Allah Alone through obeying the commands and avoiding the prohibitions and testify that Allah (Exalted be He) is your true Lord and deity and the Lord of all creation. Belief in Allah Alone involves believing that He is the Creator of the universe, the Manager of the affairs of all, and Possessor of the Beautiful Names and Exalted Attributes.
He is the Creator, the Sustainer, the Giver, the Manager of all matters and affairs, the Beneficial, the Disposer of affairs, and the Omnipotent over all things who withholds and harms. All affairs are under His control (may He be Praised).
This is called Tawhidu lRububiyyah (Oneness of Allah's Lordship), which alone would not admit one into the fold of Islam. Together with that, faith must be shown that Allah (Exalted be He) alone is worthy of worship and no one else. That is the meaning of "Laa ilaha illa Allah" and nothing else is to be invoked and sought for help. Additionally, he has to believe in TawhidulAsma' walSifat which means that Allah is the Most Perfect in His Essence, Names, Attributes, and Actions. He possesses the absolute perfection in His Essence, Names, and Attributes. He has the Absolute perfection and has no partner and none similar and there is none like unto Him.
Say (O Muhammad ﺻﻠﻰ ﺍﷲ ﻋﻠﻴﻪ ﻭﺳﻠﻢ): "He is Allâh, (the) One. "Allâhu sSamad (ﺍﻟﺴﻴﺪ ﺍﻟﺬﻱ ﻳﺼﻤﺪ ﺇﻟﻴﻪ ﻓﻲ ﺍﻟﺤﺎﺟﺎﺕ) [Allâh the SelfSufficient Master, Whom all creatures need, (He neither eats nor drinks)]. "He begets not, nor was He begotten. "And there is none coequal or comparable unto Him."
There is nothing like Him; and He is the AllHearer, the AllSeer.
All Mukalaf, mankind and Jinn, must believe in Allah's Names and Attributes which are stated in the Qur'an such as the Exalted in Might, the Wise, the Hearing, the Seeing, the Creator, the Sustainer, the Most Merciful, and so on, of Names and Attributes authentically reported from the Prophet (peace be upon him). We should accept them without Tashbih (comparison), Tamthil (likening Allah's Attributes to those of His Creation), Ta'wil (allegorical interpretation), Ta`til (denial of Allah's Attributes), addition, or deduction. All these names