פּירוש אויף בראשית 49:16

Yaakov wanted to tell when Moshiach was going to come, and the Shechina departed from him. What that means that is that Yaakov requested the coming of Moshiach, to reveal the Guela. Through this, the Shechina departed from him. What that means is that he elevated himself [spiritually] and he went so much higher than himself through prayer. He went away from himself to the Shechina.

דן ידין עמו means DAN WILL TAKE VENGEANCE FOR HIS PEOPLE from the Philistines, the phrase having the same meaning as in (Deuteronomy 32:30) “For the Lord will avenge (ידין) his people”.

דן ידין עמו, “Dan will judge his people.” This tribe had always marched in the rear of the camp in the days of Moses as well as of Joshua as testified to in Joshua 6,9: והמאסף הולך אחרי הארון, “and the rearguard walked behind the Holy Ark.” It was this tribe’s task to ward off any attacks from the rear. They had been assigned this task as they were considered exceptionally brave. The word ידין, may therefore best be translated as: “he will avenge.” Compare Deuteronomy 32,36: כי ידין ה' עמו, “for the Lord will avenge His people.”