John Gill Commentary Genesis 37:11

"And his brethren envied him; but his father kept the saying in mind." — Genesis 37:11 (ASV)

And his brethren envied him
Notwithstanding all the precaution Jacob took to prevent it; they suspecting and fearing that these dreams portended the pre-eminence of Joseph over them, or however served to fill his mind with the hopes and expectation of it:

but his father observed the saying ;
what Joseph had said in relating his dream; he laid it up in his mind and kept it there, often thought of it, and waited to see its accomplishment.