It is narrated from the Mother of the Believers Sayyidah Aishah (may Allah be pleased with her) that Masruq (may Allah have mercy on him) asked her about the voluntary prayer of the Prophet (peace and blessings be upon him) while travelling, and she said: "Two rak'ahs after every prayer."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Mujalid except his son."
Hadith Referenceالمعجم الأوسط / باب الألف / 2865
Hadith Gradingمحدثین:فيه سعيد بن زنبور وثقه ابن حبان
Hadith Takhrij«قال الهيثمي: فيه سعيد بن زنبور وقد وثقه ابن حبان «مجمع الزوائد ومنبع الفوائد، ج 2، ص 234»»