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
ahmad-zuhd:1684 – ʿAbdullāh > Abū Maʿmar > Sufyān

[Machine] Umar ibn Abdul Aziz, may Allah have mercy on him, said: "Whoever does not count his words as sins, his sins will increase."  

الزهد لأحمد:١٦٨٤ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبُو مَعْمَرٍ عَنْ سُفْيَانَ قَالَ

قَالَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ رَحِمَهُ اللَّهُ «مَنْ لَمْ يُعِدَّ كَلَامَهُ ذُنُوبَهُ كَثُرَتْ ذُنُوبُهُ»  

See similar narrations below:

Collected by Aḥmad's Zuhd
ahmad-zuhd:1723 – ʿAbdullāh from my father > ʿAbd al-Raḥman > Sufyān

[Machine] Umar ibn Abdul Aziz said, "Whoever does not consider his words as part of his actions, his sins will increase."  

الزهد لأحمد:١٧٢٣ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنِي أَبِي حَدَّثَنَا عَبْدُ الرَّحْمَنِ عَنْ سُفْيَانَ قَالَ

قَالَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ «مَنْ لَمْ يُعِدَّ كَلَامَهُ مِنْ عَمَلِهِ كَثُرَتْ ذُنُوبُهُ»