The Prophet ﷺ used to fast more often in the month of Sha’baan, and he ﷺ urged his Companions (may Allah be pleased with them) to fast during it. In this hadeeth the Companion ‘Imraan ibn Husayn (may Allah be pleased with him) related that the Prophet ﷺ asked him once - or he asked another man while ‘Imraan was listening. Mutarrif ibn ‘Abdullah ibn Al-Shikhkheer, one of the narrators of the hadeeth, it was unsure. He ﷺ said: "O Aboo so-and-so! Have you fasted the last days of this month?" The Arabic word used in the hadeeth is ‘Sarar’ meaning the last days of the month, and the word linguistically denotes the concealment of the moon during these days, i.e., the twenty-eighth, twenty-ninth, and thirtieth nights (if the month is thirty days). It has also been said that the word refers to the three ‘white’ days in the middle of the month, namely, the thirteenth, fourteenth, and fifteenth of the lunar month. He ﷺ commanded him to make up for those fast days after ‘Eid Al-Fitr and the end of the Ramadan fast, to observe the acts of worship he habitually performed, because the most endeared deed to Allah, Exalted is He, is the one performed regularly. Aboo Al-Nu’maan Muhammad ibn Al-Fadhl Al-Sadoosi (the narrator of the hadeeth) said: “I think he said: ‘He ﷺ meant Ramadan.’” However, the mention of Ramadan here is a mistake in the narration because it is incumbent on Muslims to fast duringRamadan. It could also be in reference to the time when he ﷺ made that statement and not the fasting that the addressee did not observe, conforming to the version of the hadeeth cited in Saheeh Muslim reading: “Fast for two days instead of (one fast) when you have completed (the fast of) Ramadan.” The question was about fasting on the last days of Sha‘baan. If the intended meaning of the hadeeth’s wording is the last days of the month, this means that this hadeeth seemingly contradicts the authentic hadeeth reported about the prohibition of fasting one or two days before Ramadan. This can be explained by the assumption that this man habitually fasted the last days of the lunar month, and abstained from fasting them merely for fear of the reported prohibition of fasting one or two days before Ramadan. Therefore, the Prophet ﷺ made it clear to him that the prohibition in this regard does not apply to habitual or vowed fasting on these days, but rather that what is prohibited is singling them out for fasting. It is deduced from this hadeeth that it is permissible to make up for missed voluntary fasting. The hadeeth also shows that the Prophet ﷺ used to advise his Companions (may Allah be pleased with them) and urge them to perform acts of obedience..