وَالنَّذْرِ الْمُطْلَقِ،
Translation: And fasts owed under an unspecified vow.
A specified vow names the intended fasting day; an unspecified vow imposes fasting without naming a day. Quduri places the latter in the liability-based category.
Consequently, a morning-only intention does not discharge an unspecified obligatory vow. The legal conditions for a vow’s validity are a separate subject and should not be inferred from this timing rule.