Imam Sadiq (a.s) relates: “Once, Allah revealed to Hadhrat Dawud (a.s) to give glad tidings to Khalladah, the daughter of Aus, that she was of the inmates of Paradise and would be one of his (a.s) companions in it.” Hadhrat Dawud (a.s) went to her house and knocked at her door, and it was Khalladah herself who opened it. She recognized him the moment she set her eyes upon him and so inquired: “Has something been revealed about me that you have come here?” When he (a.s) had replied in the affirmative, she said: “The revelation is probably for someone else, who resembles me in name!”
He (a.s) said: “No. The revelation has been for you. Tell me something about yourself.”
She replied: “Whenever any pain, injury or misfortune would come to afflict me, I would exhibit patience and submit myself to Allah’s pleasure. Neither would I desire any of the adversities to be warded away from me nor would I aspire for anything in exchange; I was always thankful to Him and His pleasure was the only thing that I coveted!”
When he heard this, Hadhrat Dawud (a.s) said: “It is because of this that you have reached such a rank that Allah has sent down this revelation about you.”
Having related this incident, Imam Sadiq (a.s) said: “This is that very religion, which Allah has chosen for His righteous servants.”( Dastan-ha Wa Pand-ha, vol. 3, pg. 37; Bihar al-Anwar, vol. 71, pg. 89 )