Is the Hadith: "Whoever invokes blessings upon me frequently will not encounter evil or harm at the time of death" authentic?

The aforementioned Hadith was not found, but many Ahadith have been reported concerning the virtue of sending blessings upon the Prophet, peace and blessings be upon him. Among them are his sayings: "Send blessings upon me, for it is a purification for you," and "Whoever sends blessings upon me once, Allah will send blessings upon him tenfold," and "The people closest to me on the Day of Resurrection will be those who sent the most blessings upon me." Among the things that ward off an evil death are: charity, maintaining kinship ties, and fearing Allah.