Hadith on Iman: Faith not complete until heart, speech upright

Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said, “The faith of a servant is not upright until his heart is upright, and his heart is not upright until his tongue is upright. A man will not enter Paradise if his neighbor is not secure from his evil.

Source: Musnad Aḥmad 13047

Grade: Hasan (fair) according to Al-Albani

عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يَسْتَقِيمُ إِيمَانُ عَبْدٍ حَتَّى يَسْتَقِيمَ قَلْبُهُ وَلَا يَسْتَقِيمُ قَلْبُهُ حَتَّى يَسْتَقِيمَ لِسَانُهُ وَلَا يَدْخُلُ رَجُلٌ الْجَنَّةَ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ

13047 مسند أحمد

2554 المحدث الألباني خلاصة حكم المحدث حسن في صحيح الترغيب