Saying Shiras Hayam With Emunah:
The pasuk in Shir Hashirim (4:8) states: “Teshuri m’rosh Amanah.” (You shall look from the top of Amanah.) The Ruzhiner Rebbe zy”a explained this to mean: What allowed the Jewish people standing at the Yam Suf to reach a level of “teshuri” (meaning that they were able to sing Shira)? “M’rosh Amanah.” Since their heads (rosh) were full of emunah, they were able to sing Shira to Hashem.