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:16418 – al-Ḥasan b. Muḥammad b. Isḥāq > Yūsuf b. Yaʿqūb > Sulaymān b. Ḥarb > Ḥammād b. Zayd > ʿAmr b. Dīnār > Ṭāwus > ʿUmar b. al-Khaṭṭāb Saʾal al-Nās > al-Janīn Fadhakar al-Ḥadīth

[Machine] The Messenger of Allah ﷺ decided about the fetus and Tawus al-Faris said, "It is a fetus."  

البيهقي:١٦٤١٨ – أَخْبَرْنَاهُ أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدٍ الْمُقْرِئُ أنبأ الْحَسَنُ بْنُ مُحَمَّدِ بْنِ إِسْحَاقَ ثنا يُوسُفُ بْنُ يَعْقُوبَ ثنا سُلَيْمَانُ بْنُ حَرْبٍ ثنا حَمَّادُ بْنُ زَيْدٍ عَنْ عَمْرِو بْنِ دِينَارٍ عَنْ طَاوُسٍ أَنَّ عُمَرَ بْنَ الْخَطَّابِ ؓ سَأَلَ النَّاسَ عَنِ الْجَنِينِ فَذَكَرَ الْحَدِيثَ قَالَ

فَقَضَى رَسُولُ اللهِ ﷺ فِي الْجَنِينِ غُرَّةً وَقَالَ طَاوُسٌ الْفَرَسُ غُرَّةٌ  

See similar narrations below:

Collected by Nasāʾī, Nasāʾī's Kubrá
nasai:4816 – Qutaybah > Ḥammād > ʿAmr > Ṭāwus

"The Messenger of Allah ruled that a slave (should be given as Diyah) for a fetus." Tawus said: "A horse would do in place of a slave."  

النسائي:٤٨١٦ – أَخْبَرَنَا قُتَيْبَةُ قَالَ حَدَّثَنَا حَمَّادٌ عَنْ عَمْرٍو عَنْ طَاوُسٍ أَنَّ عُمَرَ اسْتَشَارَ النَّاسَ فِي الْجَنِينِ فَقَالَ

حَمَلُ بْنُ مَالِكٍ قَضَى رَسُولُ اللَّهِ ﷺ فِي الْجَنِينِ غُرَّةً قَالَ طَاوُسٌ إِنَّ الْفَرَسَ غُرَّةٌ  

nasai-kubra:6991 – Qutaybah b. Saʿīd > Ḥammād > ʿAmr > Ṭāwus

"The Messenger of Allah ruled that a slave (should be given as Diyah) for a fetus." Tawus said: "A horse would do in place of a slave." (Using translation from Nasāʾī 4816)  

الكبرى للنسائي:٦٩٩١ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ قَالَ حَدَّثَنَا حَمَّادٌ عَنْ عَمْرٍو عَنْ طَاوُسٍ أَنَّ عُمَرَ اسْتَشَارَ النَّاسَ فِي الْجَنِينِ فَقَالَ

حَمَلُ بْنُ مَالِكً «قَضَى رَسُولُ اللهِ ﷺ فِي الْجَنِينِ غُرَّةً» قَالَ طَاوُسٌ الْفَرَسُ غُرَّةٌ