#vowed a vow

"made a vow" or "solemnly promised God"

#If God will ... then Yahweh will be my God

Jacob is speaking to God in the third person. This can be stated in the second person. AT: "If you will ... then you, Yahweh, will be the God that I will worship" (UDB) (See: [[:en:ta:vol2:translate:figs_123person]])

#on this road on which I am walking

This stands for Jacob's journey to find a wife and to return home. (See: [[:en:ta:vol2:translate:figs_metonymy]])

#will give me bread to eat

Here "bread" stands for food in general. (See: [[:en:ta:vol2:translate:figs_synecdoche]])

#to my father's house

Here "house" stands for Jacob's family. AT: "to my father and the rest of my family" (See: [[:en:ta:vol2:translate:figs_metonymy]])

#a sacred stone

This means that the stone will mark the place where God appeared to him and it will be a place where people can worship God. AT: "God's house" or "God's place"