I think you are using esteem app. So you have to open you profile link in any mobile browser, then copy your post link and open esteem app. Now you have t click on transfer.

To : write down here the bot name like thebot
Asset: choose the currency you want to send, usually its Steem Dollar (SBD).
Amount: write down the amount which you want to send like thebot accepts from 0.005 to 0.1 SBD or Steem.
Memo: Paste here the link of your post you copied earlier.
Then click the Send button.
@aishaali