Muwatta Malik 68

وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ جَابِرَ بْنَ عَبْدِ اللَّهِ الأَنْصَارِيَّ، سُئِلَ عَنِ الْمَسْحِ، عَلَى الْعِمَامَةِ فَقَالَ لاَ حَتَّى يُمْسَحَ الشَّعْرُ بِالْمَاءِ ‏.‏

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

Reference

Muwatta Malik 68

In-book

Book 2, Hadith 37