Regarding gratitude for acts of kindness
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْجَرَّاحِ، حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي سُفْيَانَ، عَنْ جَابِرٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ أَبْلَى بَلاَءً فَذَكَرَهُ فَقَدْ شَكَرَهُ وَإِنْ كَتَمَهُ فَقَدْ كَفَرَهُ " .
Narrated Jabir ibn Abdullah: The Prophet (ﷺ) said: If someone is donated something, and he mentions it, he thanks for it, and if he conceals it, he is ungrateful for it.