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.
bayhaqi:8678Abū Bakr b. al-Ḥasan al-Qāḍī > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ > al-Shāfiʿī > Muslim / Ibn Khālid > Ibn Jurayj > ʿAṭāʾ

[Machine] The Prophet ﷺ heard a man saying, "Labbaik for so-and-so." The Prophet ﷺ said to him, "If you have performed Hajj for him, then say Labbaik on his behalf. Otherwise, perform Hajj for yourself, and then perform Hajj for him as well."  

البيهقي:٨٦٧٨أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَسَنِ الْقَاضِي ثنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنبأ الرَّبِيعُ أنبأ الشَّافِعِيُّ أنبأ مُسْلِمٌ يَعْنِي ابْنَ خَالِدٍ عَنِ ابْنِ جُرَيْجٍ عَنْ عَطَاءٍ قَالَ

سَمِعَ النَّبِيُّ ﷺ رَجُلًا يَقُولُ لَبَّيْكَ عَنْ فُلَانٍ فَقَالَ لَهُ النَّبِيُّ ﷺ إِنْ كُنْتَ حَجَجْتَ فَلَبِّ عَنْهُ وَإِلَّا فَاحْجُجْ عَنْ نَفْسِكَ ثُمَّ احْجُجْ عَنْهُ وَكَذَلِكَ  

رَوَاهُ سُفْيَانُ الثَّوْرِيُّ عَنِ ابْنِ جُرَيْجٍ مُرْسَلًا