If somebody gives a piece of land as an endowment and does not mark its boundaries

Sahih al-Bukhari · Book 55 · Hadith 2769

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، أَنَّهُ سَمِعَ أَنَسَ بْنَ مَالِكٍ ـ رضى الله عنه ـ يَقُولُ كَانَ أَبُو طَلْحَةَ أَكْثَرَ أَنْصَارِيٍّ بِالْمَدِينَةِ مَالاً مِنْ نَخْلٍ، وَكَانَ أَحَبُّ مَالِهِ إِلَيْهِ بَيْرَحَاءَ مُسْتَقْبِلَةَ الْمَسْجِدِ، وَكَانَ النَّبِيُّ صلى الله عليه وسل…

Narrated Anas bin Malik: Abu Talha had the greatest wealth of date-palms amongst the Ansar in Medina, and he prized above all his wealth (his garden) Bairuha', which was situated opposite the Mosque (of the Prophet (ﷺ)…