Performing Optional Salah (Prayer) on a Journey

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from al-Nadr ibn Suwayd from Yahya al- Halabiy from al-Harith ibn al-Mughirah who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘There are four Rak‘at after al-Maghrib. You must not omit them, regardless of being on a journey or while at home.’”