The pairing with Parashah Lech-Lecha, which opens with Abram called to leave his land, his family and his father's house for a place God will show him, rests on this haftarah's direct naming of Abraham as the offspring from whom Israel descends and as God's own friend, a title given to no other figure in the Hebrew Bible with quite this same explicit phrasing.
The figure stirred up from the east and called in righteousness to God's service, mentioned earlier in the same haftarah without being named outright, has traditionally been read by commentators as a reference to Abraham himself, called from Mesopotamia in the east exactly as the parashah describes, and given victory and dominion as a mark of divine favor rather than personal strength, paralleling Abram's own journey from an ordinary life into a chosen, world historical one.
The haftarah's reassurance that Israel need not fear because God has chosen them and not cast them off extends the logic of Abram's original call forward to his descendants, tying the parashah's single founding journey to a much larger promise of chosenness that the rest of the Hebrew Bible continues to assume.
The threshing instrument image that closes the haftarah also has a quiet echo in the parashah itself: Abram arrives in Canaan with nothing but his household and his faith in a promise, and the haftarah closes by picturing his descendants transformed into something strong enough to accomplish what once seemed entirely beyond them.