[Machine] Whoever gives a gift but doesn't acknowledge it, then only the person who tells us about it is more deserving of his gift. Abu Nasr ibn Qatada informed us that Abu al-Fadl ibn Khameerawayh narrated to us, who was narrated by Ahmad ibn Najdah, who was narrated by Sa'id ibn Mansur, who was narrated by Sufyan, from 'Amr ibn Dinar, from Salim, from his father, from 'Umar. Al-Bukhari mentioned this and said it is the most authentic.  

مَنْ وَهَبَ هِبَةً فَلَمْ يُثَبْ فَهُوَ أَحَقُّ بِهِبَتِهِ إِلَّا لِذِي رَحِمٍ أَخْبَرَنَاهُ أَبُو نَصْرِ بْنُ قَتَادَةَ أنبأ أَبُو الْفَضْلِ بْنُ خَمِيرَوَيْهِ ثنا أَحْمَدُ بْنُ نَجْدَةَ ثنا سَعِيدُ بْنُ مَنْصُورٍ ثنا سُفْيَانُ عَنْ عَمْرِو بْنِ دِينَارٍ عَنْ سَالِمٍ عَنْ أَبِيهِ عَنْ عُمَرَ فَذَكَرَهُ قَالَ الْبُخَارِيُّ هَذَا أَصَحُّ