#What if

"What should I do if"

#will not be willing to follow me

"will not follow me" or "refuses to come back with me"

#Must I take your son back to the land from which you came

"Should I take you son to live in the land from which you came"

#Make sure that you do not take my son back there

The phrase "Make sure" emphasizes the command that follows. AT: "Be careful not to take my son back there" or "You definitely must not take my son there"

#who took me from my father's house

Here "house" stands for the people in his family. AT: "who took me from my father and the rest of my family" (See: [[:en:ta:vol2:translate:figs_metonymy]])

#promised me with a solemn oath

"swore an oath to me"

#saying, 'To your offspring I will give this land,'

This is a quotation within a quotation. It can be stated as an indirect quotation. AT: "saying that he would give this land to my offspring" (See: [[:en:ta:vol2:translate:figs_quotesinquotes]] and [[:en:ta:vol2:translate:figs_quotations]])

#he will send his angel

The words "he" and "his" refer to Yahweh.