And Hashem went before them by day in an ammud anan, to guide them haderech; and by lailah in an ammud eish, to give them ohr; so they could travel yomam valailah (day or night); Exo 14:19; Num 14:14; Deu 1:33; Deu 4:37; Psa 78:14; Psa 105:39; Neh 9:19