[2:127] And when Abraham raised up the foundations of the House, and Ishmael with him: 'Our Lord! Receive this from us. Truly You are the Hearing, the Knowing.
The success of the request is in the sincerity of the supplication. When the two of them humbly sought aid in prayer, he gave them help and fulfilled the request.
'Truly You are the Hearing of our speech, the Knowing of our states'.