Mishkat al-Masabih 4 Prayer كتاب الصلاة 893

عَنْ أَبِي بَكْرَةَ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا جَاءَهُ أَمْرٌ سُرُورًا أَوْ يُسَرُّ بِهِ خَرَّ سَاجِدًا شَاكِرًا لِلَّهِ تَعَالَى. رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ حسن غَرِيب

(This chapter does not contain sections I and III) Abu Bakra said that when anything came to God’s Messenger which caused pleasure (or, by which he was made glad), he prostrated himself in gratitude to God most high. Abu Dawud and Tirmidhi transmitted it, the latter saying this is a hasan gharib tradition.