Arabic (Original)
حَدَّثَنَا حَسَنٌ حَدَّثَنَا ابْنُ لَهِيعَةَ حَدَّثَنَا أَبُو الْأَسْوَدِ عَنْ عَبْدِ اللَّهِ بْنِ رَافِعٍ عَنْ أَبِي هُرَيْرَةَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَنْ أَدْرَكَ رَمَضَانَ وَعَلَيْهِ مِنْ رَمَضَانَ شَيْءٌ لَمْ يَقْضِهِ لَمْ يُتَقَبَّلْ مِنْهُ وَمَنْ صَامَ تَطَوُّعًا وَعَلَيْهِ مِنْ رَمَضَانَ شَيْءٌ لَمْ يَقْضِهِ فَإِنَّهُ لَا يُتَقَبَّلُ مِنْهُ حَتَّى يَصُومَهُ.
English Translation
The Messenger of Allah (peace be upon him) said: "Whoever reaches Ramadan while he still owes days from a previous Ramadan that he has not made up, his (current) fasting will not be accepted. And whoever fasts voluntarily while he still owes days from Ramadan that he has not made up, his voluntary fasting will not be accepted until he fasts them."