Musar do Przysłów 6:10

Behold, Shlomo repeatedly exhorted many times on this in seeing the evil of laziness and the greatness of the harm resulting from it. He said "a little sleep, a little slumber, a little folding of the hands to rest. Then shall your poverty come as a traveler" (Mishlei 24:33). For behold, even though the lazy person is not doing evil actively, nevertheless he brings evil on himself through his very inactivity.

Before beginning a deed: that one not allow a Mitzva to become delayed (lit. Chametz).

Rather when the time of its performance comes, or when it happens to present itself to him, or when the thought of performing it enters his mind, he should hurry and hasten to seize hold of it and perform it, and not allow time to go by in between. For there is no danger like its danger. Since, behold each new second that arises can bring with it a new impediment to the good deed.

Comparable is the instance of one who is too lazy to study the Torah and to observe the commandments, for the indolent love rest and as a result find God's commandments difficult for them and the study of the Torah burdensome. And so they flee from study to rest. When they do sit in the synagogue they sleep, as it is said : "Slothfulness casteth into a deep sleep" (Prov. 19:15). For laziness creates a desire for sleep. King Solomon warned us long ago, "Yet a little sleep, a little slumber, a little folding of the hands to sleep" (Prov. 6:10).