Benefits and Issues: ➊ Twenty-nine fasts, in terms of overall reward, are like thirty, because the foundation of this action is sincerity and obedience.
➋ In (lama sumna), "ma" is either a relative pronoun or a verbal noun. (: Awn al-Ma‘bud)
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2322