فأتاه الرسول فأبلغه. فقال له بلال هل أنت مبلغ عني الأمير كما بلغتني عنه؟ قال نعم. قال قل له والله لئن وليتني لا عزلتني. فأبلغه ذلك. فقال خالد ماله قاتله الله! إنه ليعد من نفسه بكفاية. فدعاه فولّاه
The messenger went and told Bilal, whereupon the latter asked, Will you tell the commander something from me just as you told me something from him? Yes, the messenger said. Bilal continued, Tell him, ‘By God, if you will ever appoint me, you may not dismiss me thereafter.’  When the messenger told Khalid, the latter said, What is with him, God damn him! He makes promises for himself with assurance. He then summoned him and appointed him to a post