Is there evidence for raising the hands during the takbirs of the prayer for rain?

The questioner : Okay, another question regarding the takbirs of the prayer for rain: seven in the first rak'ah and five in the second. Is there a text?

The Shaykh : There is no text. There is only a phrase in some hadiths comparing it to the prayer of the two festivals, and they took from the comparison. But it appears that this is an undesirable expansion in legal deduction. This reminds us of the rule that Abdullah asked me about this morning: "Every general text that has not been acted upon in part of its parts cannot be used as evidence for its parts, because it has not been acted upon." And so, the Messenger (peace and blessings be upon him) prayed a lot, but it is not reported that he raised his hands in the prayer for rain as he did in the prayer of the two festivals.