Explanation of the Hadith, he said that there is no god except Allah and does not believe in anything besides Allah….

According to the authority of Tariq ibn Ashim al-Ashjai, the chain of its transmission can be traced back to the Prophet: "Whoever says there is no God but Allah and disbelieves in worshippers other than Allah, his wealth and lineage will be forbidden, and his account will belong to Allah.".
(Hadith) – (Narrated by Muslim)

illustrate:

He – may Allah bless him and grant him peace – explained in this hadith that it is not forbidden to kill someone and take his money unless both of the following two things are met: First: saying that there is no god except Allah Almighty. Second: not believing in any other worship except God Almighty. If these two things are present, a person must give it up outwardly and entrust the inner things to God Almighty, unless he does something that is permitted for his lineage, such as apostasy, or his wealth, such as withholding zakat, or his honor, such as delaying the repayment of debts.

Meaning:

His wealth and lineage are forbidden:
Based on his performance, he was forbidden to take his money and kill him.
His reckoning is with God:
That is, God Almighty is responsible for the person who utters this sentence and rewards him according to his intention and belief.
Who says there is no God but Allah:
He said it, knew its meaning, and acted upon it.
He doesn’t believe in anything other than God, whom he worships:
He wholeheartedly denied the existence of any deity other than God.

The benefits of Sunnah include:

Meaning: There is no god except God, and do not believe in other things to worship, such as idols, graves and other things.

Merely declaring “There is no god but Allah,” while not believing in any other worshipper besides Allah, does not forbid blood and money, even if he knows their meaning and acts accordingly, as long as he does not increase doubts about the belief in worshipping anything besides God.
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Anyone who follows monotheism and superficially obeys its laws must abandon it until things that contradict it become clear.

If a pagan converts to Islam, it is obligatory to stop associating with him, even in a combative state, until he understands that this is not the case.

A person may say: There is no god worthy of worship except Allah, and will not disbelieve in what is worshipped besides Allah.

Judgment in this world is based on superficial things, but in the hereafter, it is based on intention and goal.

The property and bloodline of a Muslim are inviolable except by right.

The virtues of Islam, the blood and wealth of its followers are protected.

It is forbidden to take a Muslim’s property, or to pay a fine for what they destroy unless required by Islamic law (such as zakat).