Al-Tabaqat Al-Kubra by Ibn Saad, vol. 3, p. 427
“lao dal diya, matlab hai ke aap ko invite kar rahe the ke tum yahan aage aao, aao to yahan par battlefield banega. yahan par to ek sahabi kehte hain ke yeh jo aap ne yahan palao dala hai, to aap ki apni is se hai ke khuda ne aisa order kiya hai aap ko.”