Sunan an-Nasa'i
Narrated by Umar ibn al-Khattab
إِنَّمَا الأَعْمَالُ بِالنِّيَّاتِ
Actions are judged by intentions, and every person will get what they intended.
Sunan an-Nasa'i
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 an-Nasa'i
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 an-Nasa'i
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 an-Nasa'i
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.