Q.The question is; when can you raise your hands during du’aa? I heard that it is restricted to certain times.
A.The shaykh (hafidahullaah) said; that the most correct opinion is that one can raise their hands whilst making du’aa at any and every time, except during the Friday prayers while the imam is giving the khutbah. There is a second opinion, that it is only permissible while making istigaathaa. The shaykh (hafidhahulaah) said; that there is no evidence for this. As-suyooti has a small treatise talking about all the different hadeeth and narrations of when the hands are raised in du’aa. Also sheikhul islaam ibn Taymiyyah says that the hands should be raised in du’aa every time except, during the khutbah on Friday and the evidence for this is that there are two hadeeth.
One is saying that Allaah azza wa jall is shy when His servant raises his hands to ask for something that He would let those hands fall down with nothing being in them, meaning without the supplication being answered.
The second is the hadeeth talking about the traveller, the wayfarer who was dirty and dusty and he was raising his hands to the heavens to pray but he was not answered because of him not eating and drinking what was halaal.
The shaykh (hafidhahullaah) said that these two hadeeths show us that raising the hands during du’aa are part of the etiquettes’ of supplicating and that they are part of the etiquettes of one’s prayers and supplication being answered.
Shaykh Saalih Muhammad al-Luhaydaan (May Allaah preserve him) (Kitaab-ut-Tawheed Class, Q&A Session 08-08-2012, Riyadh)