Al-Husayn ibn Said, from Ali ibn al-Numan, from Said al-Araj, who said:
I (narrator) asked Abu Abdillah عليه السلام, peace be upon him, about ‘the fasting person tasting something and not swallowing it.’ Imam عليه السلام said: “No.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 389