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:2247 – ʿAbdullāh from my father > Jarīr > Manṣūr > Hilāl b. Abū ʿUbaydah

[Machine] As long as the man's heart remembers Allah, he is in a state of prayer, even if he is in the marketplace. And if he moves his lips, it is even greater.  

الزهد لأحمد:٢٢٤٧ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبِي حَدَّثَنَا جَرِيرٌ عَنْ مَنْصُورٍ عَنْ هِلَالِ بْنِ أَبِي عُبَيْدَةَ قَالَ

«مَا دَامَ قَلْبُ الرَّجُلِ يَذْكُرُ اللَّهَ فَهُوَ فِي صَلَاةٍ وَإِنْ كَانَ فِي السُّوقِ وَإِنْ حَرَّكَ شَفَتَيْهِ فَهُوَ أَعْظَمُ»  

See similar narrations below:

Collected by Aḥmad's Zuhd
ahmad-zuhd:2029 – ʿAbdullāh from my father > Jarīr > Manṣūr > Sālim > Masrūq

[Machine] As long as a man's heart remembers Allah, he is in prayer even if he is in the marketplace.  

الزهد لأحمد:٢٠٢٩ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنِي أَبِي حَدَّثَنَا جَرِيرٌ عَنْ مَنْصُورٍ عَنْ سَالِمٍ عَنْ مَسْرُوقٍ قَالَ

«مَا دَامَ قَلْبُ الرَّجُلِ يَذْكَرُ اللَّهَ ﷻ فَهُوَ فِي الصَّلَاةِ وَإِنْ كَانَ فِي السُّوقِ»