كَانَ النَّبيُّ صلى الله عليه وسلم إِذَا أَتَاهُ أَمْرٌ يَسُرُّهُ أَوْ يُسَرُّ بِهِ خَرَّ سَاجِداً شُكْراً لِلَّهِ تَبَارَكَ وَتَعَالَى
The Prophet (ﷺ), upon receiving news which pleased him or which caused pleasure, would prostrate in gratitude to Allah blessed and exalted.
Abu Dawud, Ibn Majah, At-Tirmidhi. See also Al-Albani, Sahih Ibn Majah 1/233, and 'Irwa'ul-Ghalil 2/226.