{But I call God for a witness upon my soul} (Eg(9320)de martura
ton theon epikaloumai epi t(886e) em(886e) psuch(886e)). Solemn attestation,
"calling heaven to witness is frequent in literature from Homer
onwards" (Plummer). Thus God is described above (cf.  1Th 2:5,10  Ro 1:9  Ga 1:20  Php 1:8 ). {To spare you} (pheidomenos hum(936e)).
Present middle participle (causal rather than final) of
pheidomai, old verb, to hold back, to spare. Ablative case
hum(936e).