A Tang Chinese source called the Jiu Tang Shiu on the origins of [[Tachkastan]] mentions the same event but refers to Hani as a Persian-Camel herder and to Al-Nu'man as the Lion-man.
It seems that his bishop, Paul/aka Gabriel (aka Dihya ibn Khalifa the Calevite) met with Heraclius not long before or after the Battle of Dhi Qar when they established an alliance to overthrow Khosrow II.