Yes, you do need stable income to qualify for a mortgage. The stability is important to verify because this is how the lender will prove to the investor that you will be able to continue to make the mortgage payment long term.
Since financing a house is a long term debt, there will need to be a case that the income is likely to continue long term.
Since financing a house is a long term debt, there will need to be a case that the income is likely to continue long term.