Abu Dawud
The Office Of The Judge
Book Number: 018 / Hadith Number: 3592
Narated By Khuraym Ibn Fatik : The Apostle of Allah (pbuh) offered the morning prayer. When he finished it, he stood up and said three times: False witness has been made equivalent to attributing a partner to Allah. He then recited: "So avoid the abomination of idols and avoid speaking falsehood as people pure of faith to Allah, not associating anything with Him.