HOUSTON (CBSDFW.COM/AP) — Former President George H.W. Bush thanked Houston for its “professionalism and obvious care” during the memorials and services for his late wife, Barbara Bush.

In a tweet posted Wednesday morning, the 93-year-old Bush thanks Houston Mayor Sylvester Turner, the city police and transit agency, Second Baptist Church and St. Martin’s Episcopal Church “and really all Houstonians” for “making Barbara’s visitors and funeral guests feel so welcomed.”

The former first lady died April 17.

The 41st president makes no mention of his own health in his tweet. He has been in Houston Methodist Hospital since Sunday, a day after his wife’s funeral, for treatment of an infection that’s spread to his blood.

A family spokesman has said Bush is “responding and recovering.”

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)