Parshas Shelach (and also on Davening)
???-?, ??? ???? ???-???, ??? ???, ????;
The Meshech Chachma asks why here, by the miraglim, Moshe only says Hashem once, yet by the eygel, Moshe says Hashem twice.
The Meshech Chachma responds that we say Hashem twice, once for the action and once for the thoughts. We need teshuva for our evil thoughts, and we need an additional teshuva for the actions which are a result of said thoughts.
By the eygel, there was a need for two types of teshuva, one for the thoughts of avoda zara, and one for the action of idolatry. By the miraglim, however, there was no actual action. Klal Yisroel as a whole only committed an aveira via thoughts, not actions.Therefore only one type of teshuva was needed, thus Moshe only davened for that teshuva, so he only needed to say Hashem once.