on whether the prohibited act is considered leaving off an obligatory duty?

The questioner : on whether the prohibited act is considered leaving off an obligatory duty?

The Shaykh : No, the reality is that it applies to commands and it applies to prohibitions. This is regarding commands, and the performance of commands? It is obedience. But perhaps it is indicated by His saying: This verse, yes, indicates this. It is correct that leaving off the obligatory duty and falling into the prohibition, and performing the prohibited act, is leaving off the obligatory duty, because it is obligatory for him to refrain. Ibn 'Abbas says: "Whoever leaves off something of his ritual or forgets it, then..."