Al-Baqarah 2:209

<h2>Entering Islam in its Entirety is obligated</h2><p>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. `Al-`Awfi said that Ibn `Abbas said, and also Mujahid, Tawus, Ad-Dahhak, `Ikrimah, Qatadah, As-Suddi and Ibn Zayd said that Allah's statement: </p><div class="arabic uthmani">ادْخُلُواْ فِي السِّلْمِ</div><p>(Enter Silm) means Islam. Allah's statement: </p><div class="arabic uthmani">كَآفَّةً</div><p>(...perfectly) means, in its entirety. This is the Tafsir of Ibn `Abbas, Mujahid, Abu Al-`Aliyah, `Ikrimah, Ar-Rabi` bin Anas, As-Suddi, Muqatil bin Hayyan, Qatadah and Ad-Dahhak. Mujahid said that the Ayah 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.' </p><p>Ibn Abu Hatim reported that Ibn `Abbas said that: </p><div class="arabic uthmani">يَـأَيُّهَا الَّذِينَ ءَامَنُواْ ادْخُلُواْ فِي السِّلْمِ كَآفَّةً</div><p>(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: </p><div class="arabic …

And if ye slide back after the clear proofs have come unto you, then know that Allah is Mighty, Wise.

If ye backslide after the clear (Signs) have come to you, then know that Allah is Exalted in Power, Wise.

Then if you slide back after the clear signs (Prophet Muhammad SAW and this Quran, and Islam) have come to you, then know that Allah is All-Mighty, All-Wise.

But if you slip after the proofs have come to you, know that God is Powerful and Wise.