John Trapp on Psalms 147:13

Verſ. 13 For hee hath ſtrengthened the bars, &c.] So that the gates of Hell ſhall not prevail againſt them. God hath promiſed to break in peeces thoſe gates of braſs, and cut in ſunder thoſe bars of Iron (as Sampſon did the gates of Gaza) Iſa. 45.2. to perfect, ſtabliſh, ſtrengthen and ſettle his Saints, 1 Pet. 5.10. to bee a wall of fire, round about them, &c.

Hee hath bleſſed thy Children within thee] Making them to bee many, Iſa. 54.1. and all taught of God, verſ. 13. children that will not lye, Iſa. 63.8.