AhsanAllahu ileikum, in the first tashahhud i think i said “rasu” instead of “rasuluhu”. Is the prayer valid if intentionally someone skipped the first tashahhud? JazakAllah khayr

Ustadh AbdulAziz al-Haqqan
We mentioned in manhaj assalikeen if you intentionally skip an obligation it invalidates the salah, and the 2st tashahud is an obligation.