Eclesiastés 9:8 Halajá: Mishneh Torah, Repentance & Sefer Chasidim

Ever should man look upon himself as if he is nigh to death, lest he die during the interval, as a consequence whereof he will be outstanding in his sin; he should, therefore not tarry but repent presently. He should not say: "In old age I will repent", perhaps he will die before old age overtakes him. To this Solomon in his wisdom pointed, saying: "Let thy garments always be white". (Ecc. 9.8).¹Pirke Abot, 2.15; Shabbat, 153a. C.

“Let your garments be always white” (Eccl. 9:8). He should always regard himself as if about to die, and perhaps he will die soon thus dying in sin,¹Shabbath 153a. therefore let him repent immediately of his sin, as it is written “ Repent one day before thy death, etc.” Therefore let him repent one day before his death, for one hour in repentance is good.²Aboth 4:22.