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:15668 – Abū Ḥāzim al-Ḥāfiẓ > Bw al-Faḍl b. Khumayrawayh > Aḥmad b. Najdah > Saʿīd b. Manṣūr > Sufyān > ʿAmr b. Dīnār > Ibn ʿAbbās

[Machine] There is no breastfeeding except what is within the two boundaries, this is the correct and established answer.  

البيهقي:١٥٦٦٨ – أَخْبَرَنَا أَبُو حَازِمٍ الْحَافِظُ أنا أبو الْفَضْلُ بْنُ خُمَيْرَوَيْهِ أنا أَحْمَدُ بْنُ نَجْدَةَ نا سَعِيدُ بْنُ مَنْصُورٍ نا سُفْيَانُ عَنْ عَمْرِو بْنِ دِينَارٍ عَنِ ابْنِ عَبَّاسٍ ؓ قَالَ

لَا رَضَاعَ إِلَّا مَا كَانَ فِي الْحَوْلَيْنِ هَذَا هُوَ الصَّحِيحُ مَوْقُوفٌ  

See similar narrations below:

Collected by Suyūṭī