When one of you asks permission for inserting a wooden peg in his wall, he should not prevent him. So they (the people) lowered down their heads. Then he (Abu Hurairah) said: What is the matter ? I am seeing you are neglecting (to hear this tradition), I shall spread it among you. Abu Dawud said:This is the tradition of Ibn Abi Khalaf is more perfect.  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا اسْتَأْذَنَ أَحَدُكُمْ أَخَاهُ أَنْ يَغْرِزَ خَشَبَةً فِي جِدَارِهِ فَلاَ يَمْنَعْهُ فَنَكَسُوا فَقَالَ مَا لِي أَرَاكُمْ قَدْ أَعْرَضْتُمْ لأُلْقِيَنَّهَا بَيْنَ أَكْتَافِكُمْ  

[Machine] The Messenger of Allah ﷺ said, "None of you should prevent his neighbor from fixing a peg on his wall."  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا يَمْنَعَنَّ أَحَدُكُمْ جَارَهُ أَنْ يَغْرِزَ خَشَبَةً عَلَى جِدَارِهِ»