Hello Lazaros,
Thank you for your valuable reply.
My lab setup is as follows, I got R1 connected to R2 (in middle) and R2 is connected to R3, no connection is made between R1 and 3 (no loops here) now lets say R1 has networks 10.0.0.0 on fa interface and 192.168.12.0 on S0 —>R2
R2 has 2 networks 192.168.12.0 and 192.168.23.0 which connects to both R1 and R3
R3 has similar setup as R1, network 172.16.0.0 on its Fa interface and 192.168.23.0 on S0 -->R2
R2 have both directly connected networks plus 172.16.0.0 and 10.0.0.0 configured as static routes.
R1 has a static route to reach R3 via R2 and the same for R3
Interestingly, from R2, I can ping both Fa interfaces on R1 and R3, but can’t ping R3 Fa from R1 and vice verse, it just work fine if I configure a dynamic routing protocol, a bit weird to be as its a very simple concept but It just doest work 
Appreciate your help here
Thanks a lot