אֱֽלֹהַ֗י בְּךָ֣ בָ֭טַחְתִּי אַל־אֵב֑וֹשָׁה אַל־יַֽעַלְצ֖וּ אֹיְבַ֣י לִֽי׃
Mon Dieu! en toi je me confie, que je ne sois pas déçu! Que mes ennemis ne triomphent pas de moi!
Zohar
Another explanation, "Trust in Hashem forever" - a person has to strengthen himself in the Holy One, blessed be He, throughout his life. No one can harm one who properly places his trust and strength in Him, since one who places his strength in the Holy Name endures forever.