1 Peter 3:12:

For the eyes of the Lord are over the righteous, and his ears are open unto their prayers: but the face of the Lord is against them that do evil.

See also:

Objection: David Was Honest Enough to Sing to God About His Sicknesses; We Should Pray “Honest” Prayers Like His Rather Than Saying We’re Healed When Our Bodies Say Otherwise
Objection: Jesus Literally Said to “Keep On Asking.”  Therefore, We Should Bug God Like the Widow in Jesus’ Parable.