Israeli soldiers dancing before Gaza entry: "We Have No one Rely Upon Except Our Father In Heaven"

Moments before these Israeli soldiers enter Gaza and place their lives at risk for the sake of the Land of Israel, they prepare themselves by singing and dancing songs of faith in the G-d of Israel. They are singing: 
1) "The whole world is a narrow bridge and the main thing is not to be afraid" - a famous rabbinical phrase
2) Serve G-d with joy and come before Him with song
3) "We Have No one Rely Upon Except Our Father In Heaven"