It is reported that Habba ibn Khalid and Sawa' ibn Khalid came to the Prophet, may Allah bless him and grant him peace, while he was repairing a wall - or a building - of his, and they helped him.  

عَنْ حَبَّةَ بْنِ خَالِدٍ وَسَوَاءَ بْنِ خَالِدٍ أَنَّهُمَا أَتَيَا النَّبِيَّ ﷺ وَهُوَ يُعَالِجُ حَائِطًا أَوْ بِنَاءً لَهُ فَأَعَانَاهُ  

Qays ibn Abi Hazm said, "We went to visit Khubbab after he had been cauterised seven times. He said, 'Our Companions who came before us have gone and this world did not cause the, loss. We have been struck by an affliction for which we find no place to put it down except the earth. If it were no that the Prophet, may Allah bless him and grant him peace, forbade us to pray for death, we would pray for it.'"  

أَنَّ النَّبِيَّ ﷺ نَهَانَا أَنْ نَدْعُوَ بِالْمَوْتِ لَدَعَوْتُ بِهِ  

He continued, "Then we came to him another time while he was building a wall and his and he said, 'The Muslim is rewarded for everything on which he spends money except for what he spends on dust.'  

ثُمَّ أَتَيْنَاهُ مَرَّةً أُخْرَى وَهُوَ يَبْنِي حَائِطًا لَهُ فَقَالَ إِنَّ الْمُسْلِمَ يُؤْجَرُ فِي كُلِّ شَيْءٍ يُنْفِقُهُ إِلاَّ فِي شَيْءٍ يَجْعَلُهُ فِي التُّرَابِ  

The Prophet ﷺ went by while I was repairing a hut I owned. He said, 'What is this?' I replied, 'I am mending my hut, O Messenger of Allah.' He said, 'The matter is too swift for that.'"  

مَرَّ النَّبِيُّ ﷺ وَأَنَا أُصْلِحُ خُصًّا لَنَا فَقَالَ مَا هَذَا؟ قُلْتُ أُصْلِحُ خُصَّنَا يَا رَسُولَ اللهِ فَقَالَ الأَمْرُ أَسْرَعُ مِنْ ذَلِكَ