texting while eating

One of my colleagues was recently photographed texting while she was eating. The picture then appeared on Facebook, and she was criticised using the Malay saying:

Jangan biar rezeki menunggu.
Don't make good-fortune wait.

The idea seems to be that food is a blessing, and it is bad manners to show disrespect to it by texting while you are eating.

Maybe the nearest similar saying in English is: Don't look a gift horse in the mouth. Except that the English version does not refer to food.

(My thanks to my UBD colleagues Salbrina Sharbawi and Malai Ayla for giving me this example.)