Proverbs 8:17 NRSV I love those who love me, and those who seek me diligently find me.

Lamentations 3:25 NIV The Lord is good to those whose hope is in him, to the one who seeks him;

John 14:21 NRSV “They who have my commandments and keep them are those who love me; and those who love me will be loved by my Father, and I will love them and reveal myself to them.”

Additional reading:
Seeking Richly Rewarded by Charles Spurgeon at The Spurgeon Archive