It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he said: When a person spits phlegm in front of people, he should cover it with both hands until his phlegm falls to the ground. And when a person is fasting, he should apply oil so that the effect of fasting is not visible on him.
Hadith Referenceالادب المفرد / كتاب / 1303
Hadith Gradingالألبانی:ضعيف الإسناد موقوفًا
Hadith Takhrij«ضعيف الإسناد موقوفًا : أخرجه ابن أبى شيبة : 9755 و البيهقي فى شعب الإيمان : 6902»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: The chain of narration of this report is weak; in it, Abdur Rahman bin Iyash (or Abbas) is majhool (unknown). However, when coughing or sneezing, one should cover the mouth with the hand or a piece of cloth, etc., so that saliva or the like does not reach those sitting nearby.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 1303