Sunan an-Nasa'i, Volume 6, Book 49, Hadith 5398 (DarusSalam) ⓘ
It was narrated from Ibn 'Abbas that: A man came to the Prophet [SAW] and said: "My father is an old man, can I perform Hajj on his behalf?" He said: "Yes. Don't you think that if he owed a debt and you paid it off, that would suffice him?"
أَخْبَرَنَا مُحَمَّدُ بْنُ مَعْمَرٍ، قَالَ حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ زَكَرِيَّا بْنِ إِسْحَاقَ، عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ أَبِي الشَّعْثَاءِ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَجُلاً، جَاءَ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ إِنَّ أَبِي شَيْخٌ كَبِيرٌ أَفَأَحُجُّ عَنْهُ قَالَ " نَعَمْ أَرَأَيْتَ لَوْ كَانَ عَلَيْهِ دَيْنٌ فَقَضَيْتَهُ أَكَانَ يُجْزِئُ عَنْهُ " .
also referenced under: Hadith 5396 (Reference) & Book 49, Hadith 18 (In-Book)