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.
bayhaqi:9124Abū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ b. Sulaymān > al-Shāfiʿī > Muslim b. Khālid > Ibn Jurayj > ʿAṭāʾ

[Machine] "He (the Prophet Muhammad) said that in one hair (of the eyebrows) there is length, and in two hairs there are two lengths, and in three hairs there is blood. We have narrated from Al-Hasan al-Basri and Ata that they said: in three hairs, blood is the same for the one who unintentionally plucks them and the one who intentionally plucks them."  

البيهقي:٩١٢٤أَخْبَرَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو ثنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنبأ الرَّبِيعُ بْنُ سُلَيْمَانَ أنبأ الشَّافِعِيُّ أنبأ مُسْلِمُ بْنُ خَالِدٍ عَنِ ابْنِ جُرَيْجٍ عَنْ عَطَاءٍ

أَنَّهُ قَالَ فِي الشَّعْرَةِ مُدٌّ وَفِي الشَّعْرَتَيْنِ مُدَّانِ وَفِي الثَّلَاثِ فَصَاعِدًا دَمٌ وَرُوِّينَا عَنِ الْحَسَنِ الْبَصْرِيِّ وَعَطَاءٍ أَنَّهُمَا قَالَا فِي ثَلَاثِ شَعْرَاتٍ دَمٌ النَّاسِي وَالْمُتَعَمِّدُ فِيهَا سَوَاءٌ