This is a very common concept in the New Testament, but off the top of my head I can't think of a place that says it in so many words.
Some related passages:
Matt. 7:16 "Ye shall know them by their fruits."
John 21:15 "Feed My lambs." (Jesus, after asking Peter if he loves him and receiving the answer "yes")
Deuteronomy 22:4 Leviticus 25:35 Philippians 2:25
January 2011
helping her "brothers" and "sisters" (fellow slaves)
If Mark had any siblings, the information is nowhere to be found in scripture or tradition.
He had 11 brothers and sisters.
Jesus' half brothers were named James (the less) and Joses and Judas and Simon. Scripture says that he had half-sisters, but it does not give their names
There are 4 brothers and 3 sister's all up. Assume your one of the brothers - hence you have 3 brothers and 3 sisters. However any one of your sisters, would have 4 brothers and 2 sisters.
he had 2 brothers and 3 sisters
She had 12 brothers and sisters
no she has no brothers or sisters.
yes, 7 brothers and sisters
not have any sisters or brothers
Athena had no brothers or sisters.