Onu söyledi dinledim.

is that correct ?

Thank you all

(Onun) söylediðini/dediðini duydum.

Inscutable, as another learner, it took a while for me to realise the difference between:

dinlemek means to listen

(müzik dinlemek - to listen to music),

duymak means to hear

(sesler duymak - to hear noises)

I hope this helps you. 

Thank you all