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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:2271 – ʿAbdullāh from my father > al-Walīd > al-Awzāʿī > Bilāl b. Saʿd

[Machine] I heard Bilal ibn Saad say, "Do not be a friend of Allah publicly while being an enemy to Him in secret."  

الزهد لأحمد:٢٢٧١ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبِي حَدَّثَنَا الْوَلِيدُ قَالَ سَمِعْتُ الْأَوْزَاعِيَّ يَقُولُ

سَمِعْتُ بِلَالَ بْنَ سَعْدٍ يَقُولُ «لَا تَكُنْ وَلِيَ اللَّهِ فِي الْعَلَانِيَةِ وَعَدُوَّهُ فِي السِّرِّ»