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»