Alhamdulilahi and may blessings and peace be upon the Messenger of Allah"Muhammad", his family and companions, and his dependence until Judgment Day
Almighty Allah said:
يَا أَيُّهَا الَّذِينَ آمَنُوا ادْخُلُوا فِي السِّلْمِ كَافَّةً وَلَا تَتَّبِعُوا خُطُوَاتِ الشَّيْطَانِ ۚ إِنَّهُ لَكُمْ عَدُوٌّ مُّبِينٌ (البقرة٢٠٨)
O ! you believers, Enter into Islam whole heartedly and do not follow Shaitan’s footsteps. Surely he is your sworn enemy Al baqara 208.}
يَا أَيُّهَا الَّذِينَ آمَنُواْ ادْخُلُواْ فِي السِّلْمِ كَآفَّةً ...
O you who believe! Enter Islam perfectly,
Allah commands His servants who believe in Him and have faith in His Messenger to implement all of Islam's legislation and law, to adhere to all of its commandments, as much as they can, and to refrain from all of its prohibitions.
إدخل في السلم كافة
(Enter Silm), means Islam.
Allah's statement، كافة -(perfectly) means, in its entirety.
That's means.
*Perform all the good works and the various pious deeds, this is especially addressed to those from among the People of the Scripture who embraced the faith.'
Ibn Abbas said that: meaning of Ayah--
يَا أَيُّهَا الَّذِينَ آمَنُواْ ادْخُلُواْ فِي السِّلْمِ كَآفَّةً
O ! you who believe! Enter Silm perfectly),
Refers to the believers among the People of the Scripture. This is because they believed in Allah; some of them still followed some parts of the Tawrah and the previous revelations. So Allah said:
ادْخُلُواْ فِي السِّلْمِ كَآفَّةً
(Enter Islam perfectly). Allah thus commanded them to embrace the legislation of the religion of Muhammad "may Allah bless and grant him peace" in its entirety and to avoid abandoning any part of it. They should no longer adhere to the Tawrah.
Allah then said:
... وَلاَ تَتَّبِعُواْ خُطُوَاتِ الشَّيْطَانِ ...
...and follow not the footsteps of Shaytan, meaning, perform the acts of worship and avoid what Satan commands you to do. This is because:
In other Ayah Almighty Allah said:-
إِنَّمَا يَأْمُرُكُم بِالسُّوءِ وَالْفَحْشَآءِ وَأَن تَقُولُواْ عَلَى اللَّهِ مَا لا تعلمون (البقرة}١٦٩.
He (Shaytan) commands you only what is evil and Fahishah (sinful), and that you should say about Allah what you don't know.
. إِنَّمَا يَدْعُو حِزْبَهُ لِيَكُونُواْ مِنْ أَصْحَـبِ السَّعِيرِ
سورة فاطر٦
He only invites his Hizb (followers) that they may become the dwellers of the blazing Fire.[Surah faatir Ayah 6]
Hence, Allah said:
... إِنَّهُ لَكُمْ عَدُوٌّ مُّبِينٌ ﴿٢٠٨﴾
Verily, he is to you an open enemy.
Almighty Allah said :-
{أَلَمْ تَرَ إِلَى الَّذِينَ يَزْعُمُونَ أَنَّهُمْ آمَنُوا بِمَا أُنزِلَ إِلَيْكَ وَمَا أُنزِلَ مِن قَبْلِكَ يُرِيدُونَ أَن يَتَحَاكَمُوا إِلَى الطَّاغُوتِ وَقَدْ أُمِرُوا أَن يَكْفُرُوا بِهِ وَيُرِيدُ الشَّيْطَانُ أَن يُضِلَّهُمْ ضَلَالًا بَعِيدًا{٦٠ }
{ Have you ˹O Prophet˺ not seen those who claim they believe in what has been revealed to you and what was revealed before you? They seek the judgment of false judges, which they were commanded to reject. And Satan ˹only˺ desires to lead them farther away }
The Almighty said:
{إِنَّ الَّذِينَ فَرَّقُوا دِينَهُمْ وَكَانُوا شِيَعاً لَسْتَ مِنْهُمْ فِي شَيْءٍ} .
{Those who divide their religion and were sects not one of them in something } .
{يَوْمَ تَبْيَضُّ وُجُوهٌ وَتَسْوَدُّ وُجُوهٌ "العمران ١٠٦}
On the day when the faces become whitening and the faces darken "Al Imran 106"}
Ibn Abbas, may Almighty Allah be pleased with him,[ Ibn Abbas one of prophet Muhammad"SAW"companion] said meaning of this Ayah is:*the faces of the one following "sunnah" right path and the coalition will become whitened, and the faces of the people of innovation and sin will become gloomy "darken".