Eikev's description of the land as one flowing with 'wheat and barley, vines, figs and pomegranates, oil olives and honey' (Deuteronomy 8:8) became, in later rabbinic law, the fixed list of the shivat haminim, the seven species, given a special place in Jewish blessing and tithing practice: produce from these seven categories alone requires the specific after-blessing known as me'ein shalosh, and their listing here is treated in rabbinic sources as establishing an order of agricultural priority for the land of Israel that later halakhic discussion of tithes and firstfruits continued to follow.
Source critics attribute Eikev, like the surrounding material in Deuteronomy, to the Deuteronomic source, and note its sustained argument that prosperity carries the danger of forgetting God, 'lest you eat and be satisfied... and your heart be lifted up' (Deuteronomy 8:12-14), as a theological theme many scholars read as shaped by the experience of exile and loss centuries after the wilderness setting the text itself describes, when a settled, once-prosperous nation had good reason to reflect on what its own forgetting had cost.
Eikev also supplies the Shema's second paragraph (Deuteronomy 11:13-21), which ties the land's rainfall directly to covenant faithfulness, a passage recited daily in Jewish liturgy immediately after the Shema's opening verse and read by classical commentary as extending the covenant's terms from the individual conscience addressed in the first paragraph to the entire nation's agricultural fortune.