Midrasch zu Schemuel I 22:6

Another thing asked R. Nachman of R. Isaac: What is the meaning of the passage (I Sam. 8, 1) And it came to pass, when Samuel was old. Did he indeed become old? Behold, he was then only fifty-two years of age; for the master said elsewhere, "Whoever dies at the age of fifty-two, is like Samuel of Ramathi (the prophet)." "Thus it was explained by R. Jochanan," replied R. Isaac: "He (Samuel) became old before his time, as it is written (Ib. 15, 11) It repented Me that I have set up Saul to be king. Samuel said before Him: 'Sovereign of the Universe, you have considered me equal in importance to Moses and Aaron, as it is written (Ps. 99, 6) Moses and Aaron among His priests, and Samuel among them that call upon His name. Just as Moses' and Aaron's work had not been destroyed during their own life, so do also I wish that my work should not be destroyed during my life.' Whereupon the Holy One, praised be He! argued with Himself, saying: 'What shall I do? Shall I cause the death of Saul? Samuel would not allow me to. Shall I cause the death of Samuel? Since he is so young, people will murmur that he was not righteous. Shall neither Saul nor Samuel die? This is impossible; for the Kingdom of David already reached its appointed time, and one reign cannot touch upon the other even by a hair breadth.' " The Holy One, praised be He! thereupon decided to cause Samuel to become old before his time. Thus the passage becomes clear (I Sam. 22, 6) Now Saul was sitting in Gibeah, under the tamarisk-tree in Ramah, What relation has Gibeah to Ramah? The relation intends to inform: What caused Saul to sit in Gibeah two and one-half years? The prayer of Samuel, the Ramathite. Is one man displaced for the sake of another? Yea, for R. Samuel b. Nachmaini said, in the name of R. Jochanan: "What is the meaning of the passage (Hos. 6, 5) Therefore have I hewed them by the prophets, I have slain them by the words of my mouth. It does not say by their acts but it says by the words of my mouth; this, therefore, means that one man is displaced for the sake of another."