It is narrated from Sayyiduna Wathilah bin al-Asqa' (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "A man should not wipe the dust from his forehead until he has finished the prayer, and there is no harm in his wiping the sweat from his temples."
No one narrated this hadith from Makhul (may Allah have mercy on him) except Uthman bin Abd al-Rahman (may Allah have mercy on him), and Muhammad bin Shu'ayb (may Allah have mercy on him) is alone in narrating it from Isa bin Abdullah (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الميم / 6907
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 134»