The Prophet ﷺ used to order the freeing of slaves during the eclipse prayer.
حدثنا زهير بن حرب حدثنا معاوية بن عمرو حدثنا زائدة عن هشام عن فاطمة
كان النبي ﷺ يأمر بالعتاقة في صلاة الكسوف
No references are available.
Bukhari narrated it, in the chapter on emancipation, in the section on what is recommended regarding freeing slaves at the time of an eclipse or (other) signs, hadith no. 2519, from the hadith of Zaida bin Qudama, with this same chain.