en_tn/2sa/12/08.md

your master's wives into your arms

Here Yahweh describes David having his master's wives as his own wives, by saying that they are "in his arms." Alternate translation: "your master's wives as your own" (See: rc://en/ta/man/translate/figs-metaphor)

I also gave you the house of Israel and Judah

Here Yahweh speaks of how he gave David his authority as king over Israel and Judah as if he gave him the houses of Israel and Judah as a gift. The phrase "the house of" means "the people of." Alternate translation: "I also gave you authority as king over the people of Israel and Judah" (See: rc://en/ta/man/translate/figs-metaphor)

if that had been too little

"if I had not given you enough"