Walitofautiana kuhusu sala za nafila, je, zinapaswa kuswaliwa kwa rakaa mbili, nne, au tatu. Malik na al-Shafi‘i walisema kwamba sala za hiari wakati wa usiku au mchana zinapaswa kuswaliwa kwa rakaa mbili kwa wakati mmoja, kwa salamu baada ya kila rakaa mbili. Abu Hanifa alisema kwamba ikiwa mwabudu anapenda, anaweza kuziswali kwa rakaa mbili kwa wakati mmoja, au tatu, au nne, au sita, au nane, bila kutoa salamu katikati. Kundi la wanazuoni wa sheria lilitofautisha kati ya sala za usiku na zile za mchana, likisema kwamba sala za usiku ni rakaa mbili kwa wakati mmoja, ilhali sala za mchana ni rakaa nne kwa wakati mmoja.

They disagreed about supererogatory prayers, whether they are to be observed as two rak'as, four, or three. Malik and al-Shafi‘1 said that voluntary prayers during the night or the day are to be offered as two at a time with a salutation after every two rak^as. Abu Hanifa said that if the worshipper likes he may offer them as two at a time, or three, or four, or six, or eight, without offering a salutation in between. A group of jurists distinguished between prayers during the night and those during the day, saying that prayers during the night are two at a time while prayers during the day are four at a time.