Sunan Abu Dawud
Narrated by Umar ibn al-Khattab
إِنَّمَا الأَعْمَالُ بِالنِّيَّاتِ
Actions are judged by intentions, and every person will get what they intended.
Sunan Abu Dawud
Narrated by Aisha
مَنْ أَحْدَثَ فِي أَمْرِنَا هَذَا مَا لَيْسَ مِنْهُ فَهُوَ رَدٌّ
Whoever introduces into this matter of ours what is not from it, it is rejected.
Sunan Abu Dawud
Narrated by Abdullah ibn Umar
Chain / critique: Muttafaqun ‘alayh in this wording — chain continuous to the Companion.
الْحَلَالُ بَيِّنٌ وَالْحَرَامُ بَيِّنٌ
The lawful is clear and the unlawful is clear, and between them are doubtful matters.
Sunan Abu Dawud
Narrated by Abu Hurayrah
Chain / critique: Some scholars grade this as weak due to a disputed narrator in one link — verify with your madhhab.
مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيَقُلْ خَيْرًا
Whoever believes in Allah and the Last Day should speak good or remain silent.
Sunan Abu Dawud
Narrated by Anas ibn Malik
لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ
None of you truly believes until he loves for his brother what he loves for himself.