Midrash su I Samuele 14:51

Whosoever offereth the sacrifice of thanksgiving honoreth Me; and to him that ordereth his way aright will I show the salvation of God (ibid. 50:23). R. Menahem the son of Yosé said: This verse alludes to those who light lamps in dark alleys for the benefit of the public. R. Simeon the son of Lakish declared: Saul was worthy of kingship because his grandfather lit lamps in dark alleys for the sake of the public. One verse tells us: And Ner (“light”) begot Kish (I Chron. 8:33), and another verse says: Kish was the father of Saul, and Ner the father of Abner was the son of Abiel (I Sam. 14:51). In this verse he was called Abiel, but because he lit lamps in dark alleys for the public good he was also called Ner (“light”). The Holy One, blessed be He, declared: In this world you require a light, but in the future, Nations shall walk at thy light, and kings at the brightness of thy horizon (Isa: 60:30).