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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:1146 – ʿAbdullāh from my father > Sufyān b. ʿUyaynah > Sālim b. Abū Ḥafṣah

[Machine] And he says in his response, "Labbaik, even if it was for show, I would still respond, Labbaik."  

الزهد لأحمد:١١٤٦ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبِي حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ عَنْ سَالِمِ بْنِ أَبِي حَفْصَةَ قَالَ كَانَ ابْنُ أَبِي نُعْمٍ يُحْرِمُ مِنَ السَّنَةِ إِلَى السَّنَةِ قَالَ

وَيَقُولُ فِي تَلْبِيَتِهِ لَبَّيْكَ لَوْ كَانَ رِيَاءً لَاضْمَحَلَّ لَبَّيْكَ