The English equivalent of this saying would probably be "If wishes were horses, beggars would rid". In Punjabi, the saying goes something like this:
Kannak khet
Kudi pet
Aa Jawaiya
Mande Kha
Loosely, that translates to a farmer whose crop is still standing in the fields, his wife is still pregnant with a baby, yet he extends an invitation to his "son in law" to have a feast at his house, and partake of the harvest.
To hear the other two idioms, do click on the audio link above