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
bayhaqi:10150 – And Ḥaddath Saʿīd > Abū al-Aḥwaṣ > Abū Isḥāq > ʿAṭāʾ b. Abū Rabāḥ > Ibn ʿAbbās > from al-Azwāj al-Thamāniyah from al-Ibil Wa-al-Baqar

[Machine] And sheep and goats are to be sacrificed according to the size of their fatness, so that there may be a balance between the two.  

البيهقي:١٠١٥٠ – قَالَ وَحَدَّثَ سَعِيدٌ ثنا أَبُو الْأَحْوَصِ ثنا أَبُو إِسْحَاقَ عَنْ عَطَاءِ بْنِ أَبِي رَبَاحٍ عَنِ ابْنِ عَبَّاسٍ قَالَ مِنَ الْأَزْوَاجِ الثَّمَانِيَةِ مِنَ الْإِبِلِ وَالْبَقَرِ

وَالضَّأْنِ وَالْمَعْزِ عَلَى قَدْرِ الْمَيْسَرَةِ مَا عَظُمَتْ فَهُوَ أَفْضَلُ  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:19083 – Abū ʿAbdullāh al-Ḥāfiẓ > ʿAbdullāh b. Muḥammad al-Ṣaydalānī > Ismāʿīl b. Qutaybah > ʿUthmān b. Abū Shaybah > Abū al-Aḥwaṣ > Abū Isḥāq > ʿAṭāʾ > Ibn ʿAbbās Thamāniyah Azwāj from al-Ḍaʾn Āthnayn And Man al-Maʿz Āthnayn al-Nʿām 143 > al-Azwāj al-Thamāniyah from al-Ibil Wa-al-Baqar Wa-al-Ḍḍaʾn

[Machine] "And honor and power are in accordance with capability, so what is great is the best."  

البيهقي:١٩٠٨٣ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي عَبْدُ اللهِ بْنُ مُحَمَّدٍ الصَّيْدَلَانِيُّ ثنا إِسْمَاعِيلُ بْنُ قُتَيْبَةَ ثنا عُثْمَانُ بْنُ أَبِي شَيْبَةَ ثنا أَبُو الْأَحْوَصِ عَنْ أَبِي إِسْحَاقَ عَنْ عَطَاءٍ عَنِ ابْنِ عَبَّاسٍ ؓ {ثَمَانِيَةَ أَزْوَاجٍ مِنَ الضَّأْنِ اثْنَيْنِ وَمَنَ الْمَعْزِ اثْنَيْنِ} [الأنعام 143] قَالَ الْأَزْوَاجُ الثَّمَانِيَةُ مِنَ الْإِبِلِ وَالْبَقَرِ وَالضَّأْنِ

وَالْمَعْزِ عَلَى قَدْرِ الْمَيْسَرَةِ فَمَا عَظُمَتْ فَهُوَ أَفْضَلُ