Shavuot 

שבועות

God selected Mount Sinai as the site for the giving of the Torah not because it is the tallest and grandest of all mountains; on the contrary, because it is small and relatively short.  

When the Holy One, blessed be He, sought to give the Torah to Israel, Mount Carmel came from Spain and Mount Tavor came from Beit Eilim…. This one said: I am called Mount Tavor, and the Divine Presence should rest upon me, as I am taller than all the mountains, and the waters of the flood did not fall upon me and cover me. This one said: I am called Mount Carmel, and the Divine Presence should rest upon me, as I lowered myself in the middle, and they passed through the sea  over me. 

The Holy One, blessed be He, said: You are already disqualified before me due to your haughtiness; you are all disqualified before me…I want none other than Sinai, for it is more humble than all of you, as it is stated: “Exalted and holy I will dwell and I will be with the downtrodden and humble” (Isaiah 57:15), and it is stated: “Though the Lord is exalted, He sees the lowly” (Psalms 138:6).  <source>( <i>Midrash</i> <i>Tehillim</i> [Buber] 68) </source>