Regarding gratitude for acts of kindness
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا بِشْرٌ، حَدَّثَنَا عُمَارَةُ بْنُ غَزِيَّةَ، قَالَ حَدَّثَنِي رَجُلٌ، مِنْ قَوْمِي عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ أُعْطِيَ عَطَاءً فَوَجَدَ فَلْيَجْزِ بِهِ فَإِنْ لَمْ يَجِدْ فَلْيُثْنِ بِهِ فَمَنْ أَثْنَى بِهِ فَقَدْ شَكَرَهُ وَمَنْ كَتَمَهُ فَقَدْ كَفَرَهُ " . قَالَ أَبُو دَاوُدَ رَوَاهُ يَحْيَى بْنُ أَيُّوبَ عَنْ عُمَارَةَ بْنِ غَزِيَّةَ عَنْ شُرَحْبِيلَ عَنْ جَابِرٍ . قَالَ أَبُو دَاوُدَ وَهُوَ شُرَحْبِيلُ يَعْنِي رَجُلاً مِنْ قَوْمِي كَأَنَّهُمْ كَرِهُوهُ فَلَمْ يُسَمُّوهُ .
Narrated Jabir ibn Abdullah: The Prophet (ﷺ) said: If someone is given something, he should give a return for it provided he can afford; if he cannot afford, he should praise him. He who praises him for it, thanks him, and he who conceals it is ungrateful to him. Abu Dawud said: It has been transmitted by Yahya b. Ayyub, from `Umarah b. Ghaziyyah, from Sharahbil on the authority of Jabir. Abu Dawud said: In the chain of this tradition `Umarah b. Ghaziyyah said: A man from my tribe said. The man referred by him is Sharahbil. It is likely that they disliked him and, therefore, they did not name him.