Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
muslim:908 – Abū Bakr b. Abū Shaybah > Ismāʿīl Ibn ʿUlayyah > Sufyān > Ḥabīb > Ṭāwus > Ibn ʿAbbās

When there was a solar eclipse the Messenger of Allah (way peace be upon him) observed eight ruku's and four prostrations (in two rak'ahs). This has been narrated by 'Ali also.  

مسلم:٩٠٨ – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ عَنْ سُفْيَانَ عَنْ حَبِيبٍ عَنْ طَاوُسٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

صَلَّى رَسُولُ اللَّهِ ﷺ حِينَ كَسَفَتِ الشَّمْسُ ثَمَانَ رَكَعَاتٍ فِي أَرْبَعِ سَجَدَاتٍ وَعَنْ عَلِيٍّ مِثْلُ ذَلِكَ  

See similar narrations below:

Collected by Nasāʾī
nasai:1467 – Yaʿqūb b. Ibrāhīm > Ismāʿīl Ibn ʿUlayyah > Sufyān al-Thawrī > Ḥabīb b. Abū Thābit > Ṭāwus > Ibn ʿAbbās

The Messenger of Allah ﷺ prayed when the sun was eclipsed, bowing eight times and prostrating four times.  

النسائي:١٤٦٧ – أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ عَنْ إِسْمَاعِيلَ ابْنِ عُلَيَّةَ قَالَ حَدَّثَنَا سُفْيَانُ الثَّوْرِيُّ عَنْ حَبِيبِ بْنِ أَبِي ثَابِتٍ عَنْ طَاوُسٍ عَنِ ابْنِ عَبَّاسٍ

أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى عِنْدَ كُسُوفِ الشَّمْسِ ثَمَانِيَ رَكَعَاتٍ وَأَرْبَعَ سَجَدَاتٍ وَعَنْ عَطَاءٍ مِثْلُ ذَلِكَ