This week is shabbat shira

When the Jewish people were in the desert, G-d sent the Jews manna to eat. They were told by Moses that each morning they should gather the amount they would need for that day- and trust that G-d would send more the next day. In preparation for shabbat they were instructed to collect double because G-d would not send the Manna on Shabbat. Two men wanted to prove Moses wrong , they took some of their double portion and spread it out for a Shabbat morning collection. Their trick didn't work out too well because, while these two men were still asleep, G-d sent birds to eat the extra mann, and by morning all the extra manna was eaten and thus when the rest of the nation awoke their was no manna on the ground shabbat morning. In order to commemorate and thank the birds it is tradition to put out food for the birds before this shabbat!