عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((إِذَا ثُوِّبَ بِالصَّلَاةِ فُتِحَتْ أَبْوَابُ السَّمَاءِ وَاسْتُجِيبَ الدُّعَاءُ))
It is narrated from Jabir bin Abdullah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: When the call to prayer is made, the gates of the heavens are opened and supplication is accepted.