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أَخْبَرَنِي شُعَيْبُ بْنُ يُوسُفَ عَنْ يَحْيَى بْنِ سَعِيدٍ الْقَطَّانِ عَنْ سَعِيدٍ عَنْ قَتَادَةَ عَنْ أَنَسٍ قَالَكَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يَرْفَعُ يَدَيْهِ فِي شَيْءٍ مِنْ الدُّعَاءِ إِلَّا فِي الِاسْتِسْقَاءِ فَإِنَّهُ كَانَ يَرْفَعُ يَدَيْهِ حَتَّى يُرَى بَيَاضُ إِبْطَيْهِ

Has reported to me [Syu'aib bin Yusuf] from [Yahya bin Sa'id Al Qaththan] from [Sa'id] from [Qatadah] from ' [Anas bin Malik] he said : "The Messenger of Allah peace be upon him did not raise his hands at all when praying, except when asking for rain. He peace be upon him raised his hands until his white armpits were visible."