Mujahid on Fasting: Backbiting and lies harm fasting

Layth reported: Mujahid, may Allah have mercy on him, said, “Whoever is safe from two characteristics will secure his fasting: backbiting and falsehood.”

Source: Faḍāʼil al-Awqāt 65

عَنْ لَيْثٍ عَنْ مُجَاهِدٍ رحمه الله قَالَ خَصْلَتَانِ مَنْ حَفِظَهُمَا سَلِمَ لَهُ صَوْمُهُ الْغِيبَةُ وَالْكَذِبُ

65 فضائل الأوقات للبيهقي