What is the ruling on eating out of forgetfulness during the Last Ten Days of Dhul-Hijjah?

Whoever eats or drinks forgetfully while fasting—whether it is an obligatory or supererogatory fast—should complete their fast, according to the Prophet's (PBUH) saying: "Whoever forgets while he is fasting and eats or drinks, let him complete his fast, for it was Allah who fed him and gave him drink." This applies to fasting in the first ten days of Dhul-Hijjah or other days, and his fast is valid, and there is nothing upon him.