Muwatta Imam Malik Book of Vows and Oaths, Hadith 4

Yahya related to me from Malik that Urwa ibn Udhayna al-Laythi said, "I went out with my grandmother who had vowed to walk to the House of Allah. When we had gone part of the way, she could not go on. I sent one of her mawlas to question Abdullah ibn Umar and I went with him. He asked Abdullah ibn Umar, and Abdullah ibn Umar said to him, 'Take her and let her ride, and when she has the strength let her ride back, and start to walk from the place from which she was unable to go on.'~
Yahya said that he had heard Malik say, "I think that she must sacrifice an animal."
Yahya related to me from Malik that he had heard that Said ibn al-Musayyab and Abu Salama ibn Abd ar- Rahman said the same as Abdullah ibn Umar.

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عُرْوَةَ بْنِ أُذَيْنَةَ اللَّيْثِيِّ، أَنَّهُ قَالَ خَرَجْتُ مَعَ جَدَّةٍ لِي عَلَيْهَا مَشْىٌ إِلَى بَيْتِ اللَّهِ حَتَّى إِذَا كُنَّا بِبَعْضِ الطَّرِيقِ عَجَزَتْ فَأَرْسَلَتْ مَوْلًى لَهَا يَسْأَلُ عَبْدَ اللَّهِ بْنَ عُمَرَ فَخَرَجْتُ مَعَهُ فَسَأَلَ عَبْدَ اللَّهِ بْنَ عُمَرَ فَقَالَ لَهُ عَبْدُ اللَّهِ بْنُ عُمَرَ مُرْهَا فَلْتَرْكَبْ ثُمَّ لْتَمْشِي مِنْ حَيْثُ عَجَزَتْ . قَالَ يَحْيَى وَسَمِعْتُ مَالِكًا يَقُولُ وَنَرَى عَلَيْهَا مَعَ ذَلِكَ الْهَدْىَ .
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ سَعِيدَ بْنَ الْمُسَيَّبِ، وَأَبَا، سَلَمَةَ بْنَ عَبْدِ الرَّحْمَنِ كَانَا يَقُولاَنِ مِثْلَ قَوْلِ عَبْدِ اللَّهِ بْنِ عُمَرَ .