[And yet] our forefathers refused to obey him, but rejected [his leadership] and turned back to Egypt in their hearts.

for wherever [you store] your valuables, that is where your heart [i.e., your real concern] will be also.

For wherever you store your valuables, that is where your heart [i.e., your real concern] will be also.

But I say to you, everyone who looks at a woman with an improper sexual desire for her [body], has already been sexually unfaithful to his mate in his heart.