Rabi’ah ibn Ka’b reported: I spent the night with the Messenger of Allah, peace and blessings be upon him, and I brought him water for his ablution and his needs. The Prophet said to me, “Ask.” I said, “I ask for your companionship in Paradise.” The Prophet said, “And anything else besides that?” I said, “That is all.” The Prophet said, “Then help me do it for you by prostrating often.”
Source: Ṣaḥīḥ Muslim 489
Grade: Sahih (authentic) according to Muslim
عَنْ رَبِيعَة بْن كَعْبٍ الْأَسْلَمِيُّ قَالَ كُنْتُ أَبِيتُ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَأَتَيْتُهُ بِوَضُوئِهِ وَحَاجَتِهِ فَقَالَ لِي سَلْ فَقُلْتُ أَسْأَلُكَ مُرَافَقَتَكَ فِي الْجَنَّةِ قَالَ أَوْ غَيْرَ ذَلِكَ قُلْتُ هُوَ ذَاكَ قَالَ فَأَعِنِّي عَلَى نَفْسِكَ بِكَثْرَةِ السُّجُودِ
489 صحيح مسلم كتاب الصلاة باب فضل السجود والحث عليه
