Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
malik:2-38Yaḥyá > Mālik > Balaghah > Jābir b. ʿAbdullāh al-Anṣārī Suʾil > al-Masḥ > al-ʿImāmah

Yahya related to me from Malik that he had heard that Jabir ibn Abdullah al-Ansari was asked about wiping over a turban. He said, "Not unless you have wiped over your hair with water."  

مالك:٢-٣٨وَحَدَّثَنِي يَحْيَى عَنْ مَالِكٍ أَنَّهُ بَلَغَهُ أَنَّ جَابِرَ بْنَ عَبْدِ اللَّهِ الأَنْصَارِيَّ سُئِلَ عَنِ الْمَسْحِ عَلَى الْعِمَامَةِ

فَقَالَ لاَ حَتَّى يُمْسَحَ الشَّعْرُ بِالْمَاءِ