וַיְהִ֥י שָׁא֖וּל עון [עוֹיֵ֣ן] אֶת־דָּוִ֑ד מֵהַיּ֥וֹם הַה֖וּא וָהָֽלְאָה׃ (ס)
Sejak hari itu dan seterusnya Saul selalu memandang Daud dengan mata curiga dan dengki.
Ibn Ezra
Because of my watchful foes (לְמַעַן שׁוֹרְרָי - lema'an shorerai): For I fear that my foot will slip (she-tim'ad ragli) and You will punish me (ve-ta'anisheni); then my watchful foes (shorerai) will rejoice. And its meaning [the meaning of shorerai] is from the root/sector (mi-gizrat) of (Numbers 24:17): "I behold him" (ashurennu), but not near." [It means] like one who eyes David hostilely (עוֹיֵן אֶת דָּוִד - o'yen et David, cf. I Samuel 18:9), those who watch intently (ha-mistaklim) for a day of calamity (be-yom ra'ah).
Radak
Because of my watchful foes: – That they may not be able to rejoice over me through my stumbling, make straight Thy way before my face. And my watchful foes (שׁררי) – is the equivalent of “my enemies,” and is derived from (the verb) “I spy him (אשׁורנו), but not nigh” (Num. 24:17), because he is looking for evil, as (in the verse) “Saul eyed David” (1 Sam. 18:9). And this prayer is that He (God) should deliver him from faults and from deliberate sins, as he says (in the verses Ps. 19:13, 14): “Clear me from hidden (faults); moreover, from deliberate sins restrain Thy servant.”