2131 إني على الحوض حتى أنظر من يرد علي منكم
I will be on the Cistern so that I see who among you will come to me

عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ رَضِيَ اللَّهُ عَنْهُمَا، قَالَتْ: قَالَ النَّبِيُّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: "إِنِّي عَلَى الحَوْضِ حَتَّى أَنْظُرَ مَنْ يَرِدُ عَلَيَّ مِنْكُمْ، وَسَيُؤْخَذُ نَاسٌ دُونِي، فَأَقُولُ: يَا رَبِّ مِنِّي وَمِنْ أُمَّتِي، فَيُقَالُ: هَلْ شَعَرْتَ مَا عَمِلُوا بَعْدَكَ، وَاللَّهِ مَا بَرِحُوا يَرْجِعُونَ عَلَى أَعْقَابِهِمْ".

Asmā’ bint Abu Bakr (may Allah be pleased with her) reported: The Prophet (may Allah’s peace and blessings be upon him) said: "I will be on the Cistern so that I see who among you will come to me. But some people will be barred from reaching me. Thereupon, I will say: 'O Lord, they belong to me and my Ummah.' It will be said: 'Do you know what they did after you? By Allah, they quickly turned back upon their heels.'"

صحيح - ( متفق عليه ). Sahih/Authentic. [Al-Bukhari and Muslim]

يخبر النبي صلى الله عليه وسلم بأنَّه سيكون على الحوض يوم القيامة إلى أن ينظُرَ مَن يأتي مِن المسلمين مِن أمَّته إلى الحوض، وسَيُؤخَذ ناسٌ بالقرب منه عليه الصَّلاة والسلام فيقول: يا رب منّي ومِن أُمَّتي، فيُقال: هل عَلِمْت ما عملوا بعد مفارقتهم إيّاك، والله ما زالوا يرجعون على أدبارِهم ويرتَدُّون عن دينِهم، فلا هم مِنك، ولا مِن أمَّتِك. وهذا في طائفة قليلة ممَّن آمَنوا في حياته، ولم يدخل فيهم مَشاهير الصَّحابة ممن حاربوا المرتدِّين، وثبتوا على الإسلام وماتوا عليه، رضي الله عنهم وأرضاهم.
The Prophet (may Allah’s peace and blessings be upon him) informs in the Hadīth that he will be on the Cistern on the Day of Judgment and will see who among his followers will come there. Some of his Ummah will be detained nearby. So, he will say: O Lord, they belong to me and my Ummah. It will be said: Do you know what they did after you left them? By Allah, they kept turning back upon their heels and leaving their religion. They do not belong to you or your Ummah. This will happen to a small group of those who believed during his lifetime; they do not include the eminent Companions who fought the apostates, remained steadfast to Islam, and died as Muslims (may Allah be pleased with them).

رفق النبي صلى الله عليه وسلم بأمته وحرصه عليهم. خطر الارتداد والرجوع من الإسلام.
It shows the Prophet's compassion toward his Ummah and his care about them. It points out the danger of apostasy from Islam.