It is also said that voluntary prayers were prescribed to make up for deficiencies in obligatory prayers, as reported in the Sunan collections from the Prophet, may Allah bless him and grant him peace:
“The first deed for which a servant will be called to account is prayer. If he has performed it completely, well and good; otherwise it will be said: ‘See whether he has any voluntary prayers.’ If he has voluntary prayers, his obligatory prayer will be completed through them. The same will then be done with the rest of his deeds.”
This completion encompasses deficiencies of every kind.
[As for intrusive thoughts that dominate the prayer, a group of scholars—including Abū Abd Allah ibn Hāmid, Abū Hāmid al-Ghazālī, and others—said that this also necessitates assistance, citing the report transmitted in the two Sahīh collections from Abū Hurayrah, may Allah be pleased with him, that the Prophet, may Allah bless him and grant him peace, said:
“When the caller gives the call to prayer, Satan retreats, passing wind so that he cannot hear the call. When the call is finished, he returns. When the call to commence the prayer is made, he retreats; when it is finished, he returns and intrudes between a person and his thoughts, saying: ‘Remember such-and-such; remember such-and-such,’ reminding him of things he had not been thinking about, until the man no longer knows how many units he has prayed. If any of you experiences this, let him perform two prostrations before giving the salutation.”
There is also an authentic report from the Prophet, may Allah bless him and grant him peace: “Prayer with intrusive thoughts, without qualification.” He made no distinction between a little and a great deal.] (*)
There is no doubt that the fewer the intrusive thoughts during prayer, the more complete it is. Thus, in the two Sahīh collections, Uthmān, may Allah be pleased with him, reports that the Prophet, may Allah bless him and grant him peace, said:
“Whoever performs ablution as I have just done, then prays two units of prayer without engaging