Belief

But those among them who are firm in knowledge and faith, who believe in what was revealed to you, these will receive a great reward.

4:162But those of them who are firm in knowledge and the believers believe in that which is revealed unto thee, and that which was revealed before thee, especially the diligent in prayer and those who pay the poor-due, the believers in Allah and the Last Day. Upon these We shall bestow immense reward.

Muhammad is the Messenger of God. And those with him are firm against the disbelievers, gentle among themselves. You see them bowing and prostrating, seeking grace from God and His pleasure. Their mark is on their faces from the trace of prostration. Their likeness in the Gospel is like a seed that sprouts, then strengthens, then thickens and rises firm upon its stalk, delighting the sower

48:29Muhammad is the messenger of Allah. And those with him are hard against the disbelievers and merciful among themselves. Thou (O Muhammad) seest them bowing and falling prostrate (in worship), seeking bounty from Allah and (His) acceptance. The mark of them is on their foreheads from the traces of prostration. Such is their likeness in the Torah and their likeness in the Gospel - like as sown corn that sendeth forth its shoot and strengtheneth it and riseth firm upon its stalk, delighting the sowers - that He may enrage the disbelievers with (the sight of) them. Allah hath promised, unto such of them as believe and do good works, forgiveness and immense reward.