וַיְהִ֥י שָׁא֖וּל עון [עוֹיֵ֣ן] אֶת־דָּוִ֑ד מֵהַיּ֥וֹם הַה֖וּא וָהָֽלְאָה׃ (ס)
At mula nang araw na iyon at sa mga sumunod pa, tiningnan na ni Saul si David nang may masamang mata.
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.”