Sunan Abi Dawud 1192
سنن أبي داود#1192Sahihحَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا مُعَاوِيَةُ بْنُ عَمْرٍو، حَدَّثَنَا زَائِدَةُ، عَنْ هِشَامٍ، عَنْ فَاطِمَةَ، عَنْ أَسْمَاءَ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يَأْمُرُ بِالْعَتَاقَةِ فِي صَلاَةِ الْكُسُوفِ .
Narrated Asma:The Prophet (peace be upon him) used to command us to free slaves on the occasion of an eclipse
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (2519)
In-book reference: 3:32