This song is a rendition to the devotees

Lyrics -

Jab janaki nath sahaya kare tab kaun bigad kare nar tero
suraj mangal som brigu sut bandhu aru guru vardayak tero
rahu ketu ki nahi gamyata sang sanischar hot uchero
dust duhshashan vimal draupadi chir utar kumantar phero
jaki sahaya kari karunanidhi badh gaye chir ke  maar ghaneri
garbha mein rakhyo parikshit raja aswasthama jab ashtra phero
bhasrat mein maruhi ke anda ta par gaj ka ghanta gero
jaki sahaya kari karunanidhi take jagat mein bhag badhero
raghuvanshi santan sukhdayi tulsidas charanan ko chero

Meaning -

1. When the master of Janki (Janki =the daughter of janak ji = Sita ji ) means Ram ji is favourable to you , who will harm you . 
2. The astrological planets like Sun ,Mars , Moon ,Venus the son of Bhrigu become your brotherly and the Jupitar becomes boon giver to you .  The Rahu and ketu cant reach you and together with them the sanischar too disappears .
3. The wicked Duhshashan and humble Draupadi : He tried to make draupadi naked and said vulgar words to her , for saving her the Lord "ocean of mercy" helped her by densly wrapping her in the cloth .
4. The Lord saved Parikshit in the womb from ashwasthama when he tried to kill parkshit (the son of Abhimanyu from Uttara )by arms .
5. Whom so ever the  "treasure of mercy " helps ,he /she have a huge fate(strong fate) in this world .
6. The Lord belonging from Raghu Clan , is pleasant to the saints ,Tulsidas is the servant of  his feet .

https://www.youtube.com/results?q=Jab+janki