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
malik:30-4 – Mālik > Thawr b. Zayd al-Dīlī > ʿAbdullāh b. ʿAbbās

Yahya related to me from Malik from Thawr ibn Zayd ad-Dili that Abdullah ibn Abbas said, "The milk which a child under two years old sucks, even if it is only one suck, makes the foster relatives haram."  

مالك:٣٠-٤ – وَحَدَّثَنِي عَنْ مَالِكٍ عَنْ ثَوْرِ بْنِ زَيْدٍ الدِّيلِيِّ عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ

أَنَّهُ كَانَ يَقُولُ مَا كَانَ فِي الْحَوْلَيْنِ وَإِنْ كَانَ مَصَّةً وَاحِدَةً فَهُوَ يُحَرِّمُ  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:15667 – ʿUmar b. Aḥmad al-ʿAbdawī > Abū al-Faḍl b. Khumayrawayh > Aḥmad b. Najdah > Saʿīd b. Manṣūr > ʿAbd al-ʿAzīz b. Muḥammad > Thawr b. Zayd > ʿIkrimah > Ibn ʿAbbās

[Machine] Whatever is in the two periods (before and after) is prohibited, even if it is an act of acquisition.  

البيهقي:١٥٦٦٧ – أَخْبَرَنَا عُمَرُ بْنُ أَحْمَدَ الْعَبْدَوِيُّ أنا أَبُو الْفَضْلِ بْنُ خُمَيْرَوَيْهِ أنا أَحْمَدُ بْنُ نَجْدَةَ نا سَعِيدُ بْنُ مَنْصُورٍ نا عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ عَنْ ثَوْرِ بْنِ زَيْدٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

مَا كَانَ فِي الْحَوْلَيْنِ فَإِنَّهُ يُحَرِّمُ وَإِنْ كَانَ مَصَّةً وَإِنْ كَانَ بَعْدَ الْحَوْلَيْنِ فَلَيْسَ بِشَيْءٍ