(3) باب مَا يُسْتَحَبُّ مِنَ الْعَتَاقَةِ فِي الْكُسُوفِ وَالآيَاتِ
Narrated Asma' bint Abu Bakr:
The Prophet (ﷺ) ordered us to free slaves at the time of solar eclipses.
Reference: Sahih al-Bukhari 2519
In-book reference: Book 49, Hadith 3
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 46, Hadith 695