'Aishah (May Allah be pleased with her) reported:
The Ayah: "Allah will not punish you for what is unintentional in your oaths ..." was revealed in respect of those persons who are in the habit of repeating: 'No, by Allah'; and 'Yes, by Allah.'[Al- Bukhari]. (RU)
App reference (RU): Book 18, Hadith 209 (RU)
Arabic/English book reference (RU): Book 18, Hadith 1719 (RU)