וּדְע֗וּ כִּֽי־הִפְלָ֣ה יְ֭הוָה חָסִ֣יד ל֑וֹ יְהוָ֥ה יִ֝שְׁמַ֗ע בְּקָרְאִ֥י אֵלָֽיו׃
Ketahuilah bahwa Yang Mahakekal telah memisahkan orang yang saleh bagi diri-Nya; Yang Mahakekal akan mendengar apabila aku berseru kepada-Nya.
Radak
But know that the Lord hath set apart (הפלה): – He hath set aside and separated. So also, “the Lord shall set apart (והפ֫לה) between the cattle of Israel” (Exod. 9:4). And its interpretation: He has separated me from all Israel to be king; on the analogy of “The Lord separated the tribe of Levi” (Deut. 10:8). And why? Because He knows me to be
Ibn Ezra
And know that Ad-nai singles out (וּדְע֗וּ כִּֽי־הִפְלָ֣ה ה' - U-d'u ki hiflah Ad-nai): [The verb hiflah is] similar to (Exodus 11:7): "that Ad-nai will distinguish (yafleh)." [This means] He distinguished/separated (hivdil) and made known (ve-hodia) who His faithful one (chasido) is. For He hears when he calls to Him.