Mark 4:32
Yet when planted, it grows and becomes the largest of all garden plants, and puts out large branches, so that the birds can perch in its shade — the contrast between the smallest beginning and the largest result is the parable's central claim. The mustard plant (Brassica nigra) can grow to over three meters in a single season — an extraordinary expansion from a tiny seed. The birds nesting in its branches echoes the great tree imagery of Ezekiel 31 and Daniel 4, both of which use the image of a great tree sheltering birds to describe a kingdom that welcomes and provides for all peoples. The kingdom that begins as the smallest possible thing becomes the sheltering place for all nations.