this singing —

 singing with music —

 humming —

will sing poems. —

 chanting vĕdham —

 humming tunes —

those who recite such poems as the outlet of their love; —

the song which he sang —

 beetles humming —

 praising —

 those who recite —

 humming —

 singing —

 she is singing; —

 learning/practicing —

 and sings; —

will sing —

will sing about —

sing —

due to singing —