1)
Why did he say "Teranenah Sefasai"? Everyone uses the lips to sing!
1.
Rashi: This will be together with the music that I will play on the harp.
2.
Radak, Malbim: My lips and Nefesh will sing to You together; my mouth and heart will be equal. This is like "Libi u'Vesari Yeranenu El Kel Chai" (84:3).
2)
What was the Pidyon?
1.
Radak: It was from Galus. My heart is not proper with me in Galus, and the Nefesh cannot receive Ru'ach ha'Kodesh to sing.
