1 Samuel 15:35
"And Samuel came no more to see Saul until the day of his death: nevertheless Samuel mourned for Saul: and the LORD repented that he had made Saul king over Israel."
Cross References (ranked by relevance)
It repenteth me that I have set up Saul to be king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.
And he stripped off his clothes also, and prophesied before Samuel in like manner, and lay down naked all that day and all that night. Wherefore they say, Is Saul also among the prophets?
And the LORD said unto Samuel, How long wilt thou mourn for Saul, seeing I have rejected him from reigning over Israel? fill thine horn with oil, and go, I will send thee to Jesse the Bethlehemite: for I have provided me a king among his sons.
And it repented the LORD that he had made man on the earth, and it grieved him at his heart.
(For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ:
Rivers of waters run down mine eyes, because they keep not thy law.
I beheld the transgressors, and was grieved; because they kept not thy word.