“Jag mag ta tar la nu” is not a standard Jain sutra or stotra line in any main Jain scripture or popular stavans / mantras, as far as traditional texts are concerned.

It sounds like:

• Either a broken / mis-heard line from a Jain stavan (devotional song), or
• A local mnemonic / children’s line used in some community, not part of formal scriptures.

If you were trying to refer to a specific mantra (like Navkar Mantra, Uvasaggaharam, Bhaktamar, etc.), please share:

• The full line as you remember it, or
• Where you heard it (stavan, pathshala, etc.)

Then I can help you with the correct Jain text and simple meaning.