וַיֹּ֧אמֶר שְׁמוּאֵ֛ל אֶל־שָׁא֖וּל נִסְכָּ֑לְתָּ לֹ֣א שָׁמַ֗רְתָּ אֶת־מִצְוַ֞ת יְהוָ֤ה אֱלֹהֶ֙יךָ֙ אֲשֶׁ֣ר צִוָּ֔ךְ כִּ֣י עַתָּ֗ה הֵכִ֨ין יְהוָ֧ה אֶת־מַֽמְלַכְתְּךָ֛ אֶל־יִשְׂרָאֵ֖ל עַד־עוֹלָֽם׃
At sinabi ni Samuel kay Saul: “Kahangalan ang ginawa mo. Hindi mo sinunod ang utos ng Walang-Hanggan na iyong Diyos na iniutos Niya sa iyo, sapagkat ngayon sana ay itinatag na ng Walang-Hanggan ang iyong paghahari sa Israel magpakailanman.
Rashi
Adonoy would have established your kingship … forever. Because when a high position is assigned to a person, it is assigned to him and to his descendants.9 See Maseches Megillah 13b.