Suicide and repentance

 Bereishis Rabba (65:22): Jakum of Zeroroth was the nephew of R. Jose b. Jo'ezer of Zeredah.5 Riding on a horse he went before the beam on which he [R. Jose] was to be hanged,6 and taunted him: ‘See the horse on which my master has let me ride, and the horse upon which your Master has made you ride.’ ‘If it is so with those who anger Him, how much more with those who do His will,’ he replied. ‘Has then any man done His will more than thou?’ he jeered. ' If it is thus with those who do His will, how much more with those who anger Him,’ he retorted. This pierced him like the poison of a snake, and he went and subjected himself to the four modes of execution inflicted by the Beth Din: stoning, burning, decapitation, and strangulation. What did he do? He took a post and planted it in the earth, raised a wall of stones around it and tied a cord to it. He made a fire in front of it and fixed a sword in the middle [of the post]. He hanged himself on the post, the cord was burnt through and he was strangled. The sword caught him, while the wall [of stones] fell upon him and he was burnt. Jose b. Jo'ezer of Zeredah fell into a doze1 and saw his [Jakum's] bier flying in the air. By a little while he has preceded me into the Garden of Eden,’ said he..