أَنَّهُ كَانَ إِذَا جَاءَهُ أَمْرُ سُرُورٍ أَوْ بُشِّرَ بِهِ خَرَّ سَاجِدًا شَاكِرًا لِلَّه
“When anything came to the Prophet ﷺ which caused pleasure (or, by which he was made glad), he prostrated himself in gratitude to Allah.” — Sunan Abu Dawud #2774