Create a matrix of 35 rows and 15 columns with numbers from 1 to 4 sampled randomly

I am trying to create a matrix of 35 rows and 15 columns with numbers from 1 to 4 sampled randomly.

Can you please help me create it just using the matrix and sample functions? I am a noob. Not sure if cbind can be used here.

This is where I am:

m1 <- matrix(data = 1:525,  nrow = 35 ,ncol = 15)
sample (m1, 1:4, replace = TRUE)

I couldn't find what I needed in the R ?help section.