Musannaf Ibn Abi Shayba 13:2032

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Abu al-Umays narrated to us, from al-Qasim ibn Abd al-Rahman, that when Ibn Mas’ud came to the land of Abyssinia, he was seized for something, so he gave two dinars until he was allowed to go his way.