1)
What is the meaning of "Lo Chalisi"?
1.
Radak: I did not seek Hashem [through Korbanos]. Most of their Tefilos were via Korbanos.
2)
What is "v'Es'apak"?
1.
Rashi: I overcame my desire. My heart said to wait for you. I overcame it, and offered the Olah. 1
2.
Radak: I strengthened my heart to overcome my desire and your command.
3.
Malbim: I held back, and did not begin the war. I thought that you commanded only about this.