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
abudawud:3472 – Sulaymān b. Dāwud > Ibn Wahb > ʿUthmān b. al-Ḥakam > Yaḥyá b. Saʿīd > Lā Jāʾiḥah Fīmā Uṣīb Dūn Thuluth Raʾs al-Māl

Blight is not effective when less than one-third of goods are damaged. Yayha said: That has been the established practice of Muslims.  

أبو داود:٣٤٧٢ – حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ أَخْبَرَنَا ابْنُ وَهْبٍ أَخْبَرَنِي عُثْمَانُ بْنُ الْحَكَمِ عَنْ يَحْيَى بْنِ سَعِيدٍ

أَنَّهُ قَالَ لاَ جَائِحَةَ فِيمَا أُصِيبَ دُونَ ثُلُثِ رَأْسِ الْمَالِ قَالَ يَحْيَى وَذَلِكَ فِي سُنَّةِ الْمُسْلِمِينَ  

See similar narrations below:

Collected by Aḥmad
ahmad:10885 – Muḥammad b. Yūsuf / al-Firyābī Bimakkah > al-Awzāʿī > Qurrah b. ʿAbd al-Raḥman > al-Zuhrī > Abū Salamah > Abū Hurayrah

[Machine] The Messenger of Allah ﷺ said that omitting saying "peace be upon you" is a Sunnah.  

أحمد:١٠٨٨٥ – حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ يَعْنِي الْفِرْيَابِيَّ بِمَكَّةَ حَدَّثَنَا الْأَوْزَاعِيُّ عَنْ قُرَّةَ بْنِ عَبْدِ الرَّحْمَنِ عَنِ الزُّهْرِيِّ عَنْ أَبِي سَلَمَةَ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ حَذْفُ السَّلَامِ سُنَّةٌ