The Prophet ﷺ said, "Whoever does not give up false statements (i.e. telling lies), and evil deeds, and speaking bad words to others, Allah is not in need of his (fasting) leaving his food and drink."  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لَمْ يَدَعْ قَوْلَ الزُّورِ وَالْعَمَلَ بِهِ وَالْجَهْلَ فَلَيْسَ لِلَّهِ حَاجَةٌ أَنْ يَدَعَ طَعَامَهُ وَشَرَابَهُ  

The Messenger of Allah ﷺ as saying: If anyone does not abandon falsehood and action is accordance with it, Allah has no need that he should abandon his food and drink. The narrator Ahmad (b. Yunus) said: I learnt the chain of narrators from Ibn Abi Dhi'b, and a man by his side made me understand the tradition. I think he was his cousin. (Using translation from Abū Dāʾūd 2362)   

قَالَ رَسُولُ اللهِ ﷺ مَنْ لَمْ يَدَعْ قَوْلَ الزُّورِ وَالْعَمَلَ بِهِ وَالْجَهْلَ فَلَيْسَ لِلَّهِ حَاجَةٌ أَنْ يَدَعَ طَعَامَهُ وَشَرَابَهُ قَالَ أَحْمَدُ فَهِمْتُ إِسْنَادَهُ مِنِ ابْنِ أَبِي ذِئْبٍ وَأَفْهَمَنِي الْحَدِيثَ رَجُلٌ إِلَى جَنْبِهِ أَرَاهُ ابْنَ أَخِيهِ