Seeing the New Moon - Section 1 Mishkat al-Masabih 1972
Arabic hadith text
وَعَنْ أَبِي بَكْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:" شَهْرَا عِيدٍ لَا يَنْقُصَانِ: رَمَضَانُ وَذُو الْحِجَّةِ "
Translation
Abu Bakra reported God’s messenger as saying, “The months of festival, Ramadan and Dhul-hijja, are not defective.”* *The most probable meaning is that, even if these months have only twenty-nine days, they are not on that account to be considered deficient in comparison with a month which has thirty days.(Bukhari and Muslim.)