Al-Kāfi

Hadith 848
vow
3- أَحْمَدُ بْنُ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ عَلِيِّ بْنِ أَبِي حَمْزَةَ عَنْ أَبِي بَصِيرٍ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنِ الرَّجُلِ يَقُولُ عَلَيَّ نَذْرٌ قَالَ لَيْسَ بِشَيْ‏ءٍ حَتَّى يُسَمِّيَ النَّذْرَ وَيَقُولَ عَلَيَّ صَوْمٌ للهِ أَوْ يَتَصَدَّقَ أَوْ يُعْتِقَ أَوْ يُهْدِيَ هَدْياً وَإِنْ قَالَ الرَّجُلُ أَنَا أُهْدِي هَذَا الطَّعَامَ فَلَيْسَ هَذَا بِشَيْ‏ءٍ إِنَّمَا تُهْدَى الْبُدْنُ.
3. Ahmad ibn Muhammad from has narrated from Afi ibn al-Hakam from Ali ibn abu Hamzah from abu Basir who has narrated the following: “I once asked abu ‘Abd Allah (a.s.), about the case of a man who says that there is a vow, a commitment on him. He (the Imam) said, ‘It does not have any valid effect until he says, “There is fasting, or paying charity, or freeing a slave, or offering an animal offering.” If a man says, “I give this food as an offering,” it is not valid, because only a camel or so can become an animal offering.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī