Ā’ishah (may Allah be pleased with her) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) heard the loud voices of some opponents quarreling at the door. One of them was appealing to the other to deduct his debt and asking him to be lenient, but the other was saying: "By Allah! I will not do so." The Messenger of Allah (may Allah's peace and blessings be upon him) went out to them and asked: "Where is the one who was swearing by Allah that he would not do a favor?" That man said: "I am that person, O Messenger of Allah. I will give him whatever he wishes." - [Narrated by Bukhari & Muslim]

عن عائشة رضي الله عنها قالت: سمع رسول الله صلى الله عليه وسلم صوت خُصُومٍ بالباب عاليةً أصواتُهما، وإذا أَحدُهما يَسْتَوْضِعُ الآخر وَيَسْتَرْفِقُهُ في شيء، وهو يقول: والله لا أفعل، فخرج عليهما رسول الله صلى الله عليه وسلم فقال: «أين المُتَأَلِّي على الله لا يفعل المعروف؟»، فقال: أنا يا رسول الله، فله أي ذلك أحب.
[صحيح] - [متفق عليه]

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: Sahih 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