Psalms 20:2
יַעַנְךָ ה’ בְּיוֹם צָרָה יְשַׂגֶּבְךָ שֵׁם אֱלֹקי יַעֲקֹב
May Hashem answer you on the day of distress; may the name of the G-d of Jacob set you up high.
Many have the practice to recite, in the prayer following Shemoneh Esrei, a verse that starts and ends with the same letter as their name, or that contains their name. This is the verse for the name “Yaakov.” Rashi explains that G-d promised to protect Jacob when he went to go live with Laban. Therefore, He is referred to as “the G-d of Jacob” when speaking of His protection.