1 Samuel 20:26

Nevertheless Saul spake not any thing that day: for he thought, Something hath befallen him, he is not clean; surely he is not clean.

Nevertheless, Saul spake not anything that day,.... About David's absence, took no notice of it, said nothing about it:

for he thought something had befallen him; some impurity, some nocturnal pollution, see Leviticus 15:16;

he is not clean, surely he is not clean; which he repeated in his mind for the confirmation of it, and in contempt, and to the reproach of David; and in this way he accounted for his absence the first day, and so was easy, it not being lawful and fitting for an unclean person in a ceremonial sense to eat of the peace offerings, which Saul and his family were now partaking of.