Tayammum for the one who is unable to perform wudu with water at the time of prayer

Question:
He says: I am unable to perform wudu with water because of a disability in my hand resulting from a car accident, but I am able to perform tayammum. My sons help me with wudu using water, but if the time for prayer enters and I have no one with me, should I perform tayammum for the obligatory prayer, or should I pray without tayammum?

Answer:
One of two things is required: either purifying oneself with water if possible, or performing tayammum with dust if purifying oneself with water is not possible due to its absence or due to an inability to use it. It is not permissible to perform tayammum except for one of two reasons: either the absence of water , or the inability to use it despite its presence. If he has someone to assist him in purifying himself with water, it is obligatory for him to do so, and tayammum does not suffice for him. Yes.

The presenter:
Yes, may Allah bless you.