וּלְחַנָּ֕ה יִתֵּ֛ן מָנָ֥ה אַחַ֖ת אַפָּ֑יִם כִּ֤י אֶת־חַנָּה֙ אָהֵ֔ב וַֽיהוָ֖ה סָגַ֥ר רַחְמָֽהּ׃
but unto Hannah he gave a double portion; for he loved Hannah, but the LORD had shut up her womb.
Read kabbalistic (mystical) interpretation of I Samuel 1:5: and classical mystical sources.