Musnad Ahmad 547:4

'Affan narrated to us, he said: 'Abd al-'Aziz ibn Muslim narrated to us, he said: Mutarrif narrated to us, from 'Ikrimah, from 'Uqbah ibn 'Amir al-Juhani, who said: My sister vowed to walk to the Ka'bah. The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, Allah is in no need of her walking; let her ride, and let her offer a sacrificial animal."